If a buffed unit is reduced to 1 might by Smoke Screen, then an opponent tries to use Call to Glory by removing the buff as payment (which would temporarily make the unit 0 might), does the unit die before Call to Glory resolves?

Ruling: The unit does not die from having 0 might alone. Units only die if they have damage equal to or greater than their might.

Nuances:

• Smoke Screen and other might reducers snapshot their effect once and are not continuous
• You can have 0 might units in the game
• Under current rules, cleanups don't happen before a spell resolves, so the opponent would need to add something else to the chain (like exhausting a rune) to trigger a cleanup that would kill a damaged unit at 0 might
• Under updated rules, cleanups will happen more frequently and would resolve this situation differently