Mirror Universe

Artifact    (CMC:6)

, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate this ability only during your upkeep.

159 ME1 • ENPhil Foglio

™ & © 1993—2007 Wizards of the Coast

Legal in: Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

9/16/2007
When the life totals are exchanged, each player gains or loses the amount of life necessary to equal the other player's previous life total. For example, if player A has 5 life and player B has 3 life before the exchange, player A will lose 2 life and player B will gain 2 life. Replacement effects may modify these gains and losses, and triggered abilities may trigger on them.
1/1/2011
If an effect says that a player can't lose life, that player can't exchange life totals with a player who has a lower life total; in that case, the exchange won't happen.