Muldrotha, the Gravetide + Eternal Witness + Ashnod's Altar + Walk the Aeons

Muldrotha, the Gravetide

Eternal Witness

Ashnod's Altar

Walk the Aeons

How it works

1. Cast Eternal Witness from your graveyard by paying 1.
2. Eternal Witness enters the battlefield, returning Walk the Aeons from your graveyard to your hand.
3. Activate Ashnod's Altar by sacrificing Eternal Witness, adding CC.
4. Cast Walk the Aeons by paying 4, causing you to take an extra turn after this one.
5. Repeat each turn.