If a 5 might unit is marked for 4 damage from Void Seeker, then takes damage from Hexray, and the opponent chains Call to Glory (which is then Stupified), does the unit die before Call to Glory resolves?

Ruling: Yes, the unit dies before Call to Glory resolves.

Sequence:

• Void Seeker marks the 5 might unit for 4 damage
• Hexray deals damage to the unit (bringing total damage to 5 or more)
• Opponent chains Call to Glory
• Stupify is chained to Call to Glory
• Cleanup happens after Stupify resolves, killing the unit (since it has damage equal to or exceeding its might)
• Call to Glory attempts to resolve but the unit is already dead

Nuances:

• Cleanup occurs after each resolution, not just at end of turn
• Units die during cleanup when they have damage equal to or greater than their might