Can Defiant Dance (which reduces might by 2 without a 'minimum of 1' clause) kill a unit by reducing its might to 0?

Ruling: Defiant Dance cannot directly kill a unit. It can reduce a unit's might to 0 or below, but a unit needs non-zero damage marked on it to die.

Nuances:

• Units can have 0 or even negative might values (treated as 0 for most purposes)
• The cleanup step that kills units specifically requires damage to be marked on the unit
• Effects with "minimum of 1" clauses snapshot the amount of might they are allowed to reduce upon resolution, and that snapshotted value persists for the rest of the turn
• When calculating current might, always start from base might, apply increases, then apply decreases
• If a unit loses a passive might bonus later in the turn, a snapshotted reduction can cause it to go to 0 or negative