Does putting a -1 might counter on a unit count as damage for the purpose of Imperial Decree?

Ruling: Might changes do not count as damage. Damage and might modifications are treated separately for Imperial Decree.

Nuances:

• Imperial Decree requires non-zero "damage" to be dealt; a might modification is simply the stat itself going up or down
• When assigning damage with Imperial Decree, you must assign the full might value to be lethal on one enemy; you cannot split damage thinking 1 damage is lethal
• A unit can die from being reduced to 0 health after might modifications are applied (e.g., dealing 3 damage with Hextech Ray then using Stupify to -1 might), but this is different from Imperial Decree's damage requirement