If a unit's Might is ever less than 0, it is treated as 0 when referenced by spells and abilities, and when summing Might to be assigned as damage in the Combat Damage Step. See rule 465. The Combat Damage Step for more information. 1. Although the unit’s Might is treated as 0, it is not 0. Effects that calculate Might increases and decreases use the actual value of the unit’s Might.
§ 143.2.b Core Rules PDF (officieel)
§ 143 Units have multiple Intrinsic Properties unique to them:
§ 143.2 Might: The combat statistic of a Unit. Used to determine a Unit's contribution to Combat, as well as when it is Killed by damaging effects.
