Geverifieerde rulings en officieel bevestigde community-inzichten, met per item de volledige bewijsketen: bron, citaat en klikbare §-verwijzingen.
Legion (§419.4.b)
Legion checks whether cards were finalized by an opponent, not whether an opponent controls a spell that resolves. A spell finalized by an opponent but subsequently taken over via Rebuttal still counts as finalized by the opponent, so Legion abilities remain active. Citaat uit de bron: “Battering Ram and Legion … check whether cards were finalized. Although you gained control of Stupefy, you did not finalize it; you got it after it was already finalized by your opponent.”
Rell, Magnetic
Rell, Magnetic is revised to use a reflexive trigger for Equipment attachment: when she attacks and you play a qualifying Equipment for free, 'then do this:' attaches it to her as a separate chain item, allowing players to respond before the attachment resolves. Citaat uit de bron: “If you do, then do this: Attach it to me.”
Gear cards enter play in the Ready state (not Exhausted), so they can be used immediately; Gear always enters at the controller's Base.
“Gear cannot hold or conquer battlefields, and can only exist in base. If a Gear card is played at a battlefield, it is immediately recalled to the base.”
“Gear enters play Ready, so you can use it right away. It always goes to your Base.”
Rumble, Hotheaded
Rumble, Hotheaded can choose a Mech token to recycle. Tokens inherit the recycle destination of their type—a token that is a unit or gear is recycled to the Main Deck. The token then vanishes (as tokens do whenever they leave the board), but it still counts as 'the unit you recycled,' so Rumble can check its Might. Citaat uit de bron: “tokens 'inherit' the recycle destination of their type(s), so a token that's a unit or gear is recycled to your Main Deck… it still counts as 'the unit you recycled' and Rumble can check its Might.”
Each Battlefield can only award 1 point per turn; moving a unit away and replacing it with another unit in the same turn does not grant additional points.
“Moving away from a battlefield and back to it with another unit the same turn will not gain you a bonus point.”
“Each Battlefield only gives you 1 point per turn max. You can't move a unit away and move a new one in to score twice.”
Heimerdinger, Inventor (§727.1.b.1)
Heimerdinger, Inventor can gain Jayce, Defender of Tomorrow's Empowered> activated ability (ready 2 gear) even if Jayce is not empowered, because a dependent ability exists on the card for reference and evaluation before its condition is met (rule 727.1.b.1.). Heimerdinger himself must be empowered to satisfy the ability's activation condition. Citaat uit de bron: “The Dependent Ability is present on the card for the sake of reference or evaluation until the Condition is met … Heimerdinger, Inventor is exactly one such effect.”
During the Beginning Phase, each player channels 2 Runes from the top of their Rune Deck; the second player channels 3 Runes on their very first turn to compensate for going second.
“If you're going second on your very first turn, you get 3 Runes instead to help catch up.”
Astral Heron
Astral Heron's triggered ability discounts the next card played (added to the chain and queued for finalization) this turn after the ability resolves. Erratum wording: 'When you play your first card each turn, if I'm at a battlefield, the next card you play this turn costs [2]AA less.' Citaat uit de bron: “It discounts the next card played (added to the chain and queued for finalization) this turn after the ability resolves.”
When an Attacker destroys all Defending units and still has units remaining, they conquer the Battlefield and immediately score 1 point; additionally, every time a Battlefield is conquered without winning the game, the conquering player draws a card.
“every time you conquer a Battlefield but it doesn't win you the game, you get to draw a card”
errata policy
Errata may impact the effective power level of cards, but Riot has no plans to issue errata strictly for power level reasons — only to make cards work within the rules and as intended. Citaat uit de bron: “we have no plans to issue errata strictly for power level reasons—only to make cards work within the rules and as intended”
Units with the Ganking ability may move directly from one Battlefield to another, whereas normal units can only move between their controller's Base and a Battlefield.
“only units with the Ganking ability may move between battlefields”
“Some units have Ganking though, which lets them move from Battlefield to Battlefield.”
Arise!
Arise! is revised to use a reflexive trigger: it first plays a 2 M Sand Soldier unit token for each Equipment you control, then 'Then do this:' readies up to two of them, allowing players to respond between the two effects. Citaat uit de bron: “Play a 2 M Sand Soldier unit token for each Equipment you control. Then do this: Ready up to two of them.”
Ravenborn Tome's Bonus Damage effect now applies only to the next spell played 'this turn,' preventing the bonus from carrying forward to future turns.
“The next spell you play this turn deals 1 Bonus Damage.”
Draven, Vanquisher
Draven, Vanquisher reads 'When I attack or defend, you may pay C. If you do, …' — because 'you may pay C' does not fall in the expected cost-within-instructions sequence position, the resource payment is not the base cost of the triggered ability. It is paid on resolution of the ability (not during finalization) and functions as a game action checked by 'if you do', not as a cost. Citaat uit de bron: “those resources are not a cost and are paid on resolution of the ability and not finalization.”
A unit's Might value represents both the damage it deals in combat and the total damage it can absorb before being destroyed.
“Might... this number shows how much damage they deal AND how much they can take”
Gangplank, Naval (§477.3.b)
If Stupefy is played on an empowered Gangplank, Naval who has exactly 1M, the -M value snapshots to -0M, meaning no actual -M event is generated. With no suitable event to replace, Gangplank's replacement effect does not trigger. Citaat uit de bron: “In the case of Stupefy played on a 1 M unit, no -M is given; it is snapshot to -0 M. Thus, there is no suitable event for Gangplank's replacement effect to replace.”
Even when no enemy units are present during a Showdown, both players may still play Actions and Reactions in an attempt to remove the attacking units.
“Even if there are no enemy units, players may still play Actions and Reactions to try and remove the attacking units.”
play from deck (banish first)
Cards that instruct you to play a card from your Main Deck must first banish that card, then play it from banish. This gives the game a defined zone for the card while it is being played and a place to return it if it cannot be played for any reason. This applies to Rek'Sai Swarm Queen, Void Burrower, Void Rush, and Reinforce. Citaat uit de bron: “banishing the card ensures that the game has a place to put the card until it's actually played, and a place to send the card back to if it can't be played”
Recalling a unit to base via Zhonya's Hourglass is explicitly not considered a move.
“Send it to base. This isn't a move.”
Accelerate
Accelerate creates a delayed replacement effect that causes the card to enter ready. This delayed replacement effect persists on the card even after the Accelerate keyword itself is no longer present when the card resolves. Citaat uit de bron: “Accelerate creates a delayed replacement effect that causes Atakhan to enter ready. Although he lacks the Accelerate keyword when he resolves, he still has the delayed replacement effect”
Action Spells may be played during the controller's turn or during a Showdown; on an opponent's turn, a player may only play Action Spells during Showdowns.
“Most Spells are labeled Action, which means you can play them during your turn or during a Showdown. If it's not your turn, you can only play Action Spells during Showdowns.”
Blood Rush
Blood Rush was printed without 'this turn' in its effect. The Assault 2 bonus it grants a unit is temporary and lasts only this turn, matching design intent and the pattern of Convergent Mutation. Citaat uit de bron: “the phrase 'this turn' was accidentally omitted … Give a unit Assault 2 this turn.”
Signature Cards are Legend-specific cards that can only be included in a deck matching their designated Legend, with a maximum of 3 total Signature Cards permitted across the entire deck.
“You can only use them with their matching Legend, and you can't put more than 3 total Signature Cards in your deck.”
combat (§465.2.c.4.a)
Damage-increasing replacement effects now also apply during damage assignment, in addition to prevention effects (such as Ki Barrier or Counterstrike) that already applied at that step. Citaat uit de bron: “damage increasing replacement effects will also apply during damage assignment”
A player's main deck may only contain cards belonging to the domains listed on their Champion Legend card.
“her deck must only contain cards of the Mind and Order domain”
“You can only put cards in your deck that match your Legend's Domains”
Empowered (§477.1.b.1.b.)
The empowered status is a temporary modification and not part of a card's printed traits, so it is not copyable by copy effects such as Shady Spectacles. Equipping Shady Spectacles and choosing to copy an empowered unit will not grant the empowered status to the equipped unit. Citaat uit de bron: “empowered is a status, a temporary modification, and not part of the printed traits of the card, so it will not be copied by Shady Spectacles”
Brush – Swap Back (§438.1)
When a Brush token is swapped back, the Brush token ceases to exist. A player can choose to swap back to any object that was replaced, including the original battlefield, because a replacing game object inherits all statuses and conditions of the game object it replaced (438.1). Citaat uit de bron: “The Brush token will cease to exist. When swapping back, a player can choose to swap back to any object that was replaced, including the original battlefield.”
Dragon Roost (§054.2., 369.3.)
When two mandatory positive requirements conflict on where to play a unit (e.g., Elder Dragon's AA instructing play to Dragon Roost and another effect specifying a different location), the player chooses one requirement and ignores all others. This only applies to mandatory positive requirements that specify a location or method without also preventing play elsewhere. Citaat uit de bron: “the player chooses one of those requirements and ignores all others”
Spinning Axe (Temporary while attached) (§816.2.a)
When Spinning Axe is attached to a unit, its printed rules text—including its printed Temporary keyword—becomes inactive. If Spinning Axe is separately granted Temporary, only that granted instance is active. Because only one active instance exists, rule 816.2.a does not prevent it from triggering; the inactive printed Temporary is treated as if it did not exist. Citaat uit de bron: “the grey Temporary doesn't have any function. We can treat it as if it didn't exist for the purposes of rule 816.2.a.”
Battlefield Control (open state, rule 187.4.c) (§187.4.c)
Per rule 187.4.c, a player loses control of a battlefield only in a cleanup that occurs while the turn is in an Open state and they have no units there (and no Combat/Showdown is ongoing). Control cannot be lost during a cleanup while items remain on the chain, enabling effects that kill or banish a unit and then play a new one to target that same battlefield. Citaat uit de bron: “If a player has no Units at a Battlefield and the turn is in an Open state, they lose Control of that Battlefield in the following cleanup”