Commander Liara Portyr + Eternal Scourge + Ashnod's Altar + Mimic Vat

Commander Liara Portyr

Eternal Scourge

Ashnod's Altar

Mimic Vat

How it works

1. Declare at least two creatures you control as attackers, attacking at least two opponent.
2. Liara triggers, causing all spells you cast from exile this turn to cost at least 2 less, and exiling at least two cards from the top of your library and allowing you to play them this turn.
3. Move to your post-combat main phase.
4. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding CC.
5. Mimic Vat triggers, exiling Eternal Scourge from your graveyard.
6. Cast Eternal Scourge from exile by paying 1.
7. Repeat from step 4.