>>713560770
I don't play MTG, but what I'm getting is that you destroy your own Phage to give your opponent a token copy of it, which activates its effect to lose the game since it was summoned not from the hand?

the most equivalent card in YGO I can think of would be Jackpot 7, whose win condition can be achieved by giving control to your opponent of cards that have effects that would send Jackpot 7 to the grave, and forcing those cards to trigger. like Dark Scorpion Burglars (send an opponent's spell/trap to the grave if it deals battle damage) or Needle Worm (when it flips up, the opponent mills 5 cards). although the strategy requires a lot of setup