Syr Konrad, the Grim + Morality Shift + Phyresis

Syr Konrad, the Grim

Morality Shift

Phyresis

How it works

1. Cast Morality Shift by paying 5, exchanging your library with your graveyard.
2. Syr Konrad triggers for each creature card in your graveyard and library, causing each opponent to get that many poison counters.
3. Each opponent loses the game due to having ten or more poison counters.