Magister Sphinx + Archfiend of Despair

Prerequisites

• An opponent has at least twenty life.

Steps

1. 1Cast Magister Sphinx by paying .
2. 2When Magister Sphinx enters the battlefield, it triggers, causing an opponent with at least twenty life to lose life until their life total is equal to ten.
3. 3At the beginning of your end step, Archfiend of Despair triggers, causing each opponent to lose life equal to the life they lost this turn.
4. 4The opponent targeted by Magister Sphinx in step 1 loses the game due to having zero or less life.

Effects

• Near-infinite lifeloss for target opponent
• Target opponent loses the game