When Zhonya's triggers to save a unit that was about to be killed by damage, does the unit return with damage on it or does it heal? Also, do debuffs like Stupidify remain on the unit?

Ruling: When Zhonya's triggers, the unit is recalled and healed (damage is cleared). However, other effects like might reductions from Stupidify remain on the unit.

Nuances:

• Only damage is cleared when the unit is saved
• All other effects stay the same (debuffs, stat modifications, etc.)
• Passive effects that only apply on battlefield or similar location-specific effects would not apply while recalled
• Cards like Zhonya's received errata to specifically heal the unit they save