Ashnod the Uncaring + Bolas's Citadel + Galvanic Key

Ashnod the Uncaring

Bolas's Citadel

Galvanic Key

How it works

1. Activate Bolas's Citadel by tapping it and sacrificing ten other nonland permanents you control.
2. Ashnod the Uncaring triggers, copying Bolas's Citadel's ability.
3. Resolve both Bolas's Citadel abilities, causing each opponent to lose 20 life.
4. Each opponent that had 20 or less life loses the game due to having 0 or less life.
5. Activate Galvanic Key by paying 3 and tapping it, untapping Bolas's Citadel.
6. Activate Bolas's Citadel by tapping it and sacrificing itself, Manifold Key, and eight other nonland permanents you control.
7. Ashnod the Uncaring triggers, copying Bolas's Citadel's ability.
8. Resolve both Bolas's Citadel abilities, causing each opponent to lose 20 life.
9. Each remaining opponent loses the game due to having 0 or less life.

This lethal sequence uses Ashnod the Uncaring as a ruthless amplifier, doubling the life-drain ability of Bolas's Citadel whenever you sacrifice a crew of permanents to fuel it. While Bolas's Citadel can normally only drain ten life per activation, Ashnod the Uncaring catches the sacrifice cost and duplicates the effect to instantly double the devastation to twenty life per round. To pull this off multiple times in a single turn, Galvanic Key steps in with its flash and untap capabilities to ready Bolas's Citadel for a second massive sacrifice, ensuring your opponents' life totals are wiped out entirely.