Inalla, Archmage Ritualist + Ashnod's Altar + Changeling Hero

Inalla, Archmage Ritualist

Ashnod's Altar

Changeling Hero

How it works

1. Cast Changeling Hero by paying 4.
2. Changeling Hero enters the battlefield, triggering its champion ability and Inalla.
3. Resolve the Inalla trigger, causing you to pay 1 to create a token copy of Changeling Hero with haste.
4. The token Changeling Hero enters the battlefield, championing the nontoken Changeling Hero.
5. The nontoken Changeling Hero leaves the battlefield, returning nothing from exile to the battlefield.
6. Resolve the nontoken Changeling Hero trigger from step 2, choosing not to exile anything.
7. Activate Ashnod's Altar by sacrificing the Mistbind Clique token, adding at least one mana.
8. The Changeling Hero token leaves the battlefield, returning the nontoken Changeling Hero from exile to the battlefield.
9. Repeat from step 2.