Mayael's Aria + Auriok Bladewarden + Umbral Mantle

Mayael's Aria

Auriok Bladewarden

Umbral Mantle

How it works

1. At the beginning of your upkeep, Mayael's Aria triggers.
2. Holding priority, activate Auriok Bladewarden by tapping it, giving itself +X/+X until end of turn, where X is its power.
3. Activate Auriok Bladewarden by paying 3 and untapping it, giving it +2/+2 until end of turn.
4. Repeat from step 2 until Auriok Bladewarden has power nineteen or greater, omitting step 3 on the final iteration, if possible.
5. Resolve the Mayael's Aria trigger from step 1, causing you to put a +1/+1 counter on each creature you control, gain 10 life and win the game.

This clever loop turns Auriok Bladewarden into an exponential powerhouse by leveraging its tap ability to pump its own power higher and higher. By equipping it with Umbral Mantle, you gain a repeatable way to untap it for three mana while permanently building upon those stacked bonuses. Once the Bladewarden's power surges past nineteen, the upkeep trigger of Mayael's Aria resolves to hand you the game on a silver platter.