Evolution Witness + Agonasaur Rex + Kheru Goldkeeper + Adrix and Nev, Twincasters + Bard, King of Dale

Evolution Witness

Agonasaur Rex

Kheru Goldkeeper

Adrix and Nev, Twincasters

Bard, King of Dale

How it works

1. Activate Agonasaur Rex's cycling ability by paying 2 and discarding it.
2. Agonasaur Rex triggers, putting two +1/+1 counters on Evolution Witness.
3. Evolution Witness triggers, returning Agonasaur Rex from your graveyard to your hand.
4. Kheru Goldkeeper triggers, creating four Treasure tokens.
5. Resolve the Agonasaur Rex ability from step 1, causing you to draw a card.
6. Activate three Treasures by tapping and sacrificing them, adding 2.
7. Repeat.

This looping engine is fueled by cycling Agonasaur Rex to drop two +1/+1 counters onto Evolution Witness, which triggers its ability to pull Agonasaur Rex right back out of your graveyard. Because Agonasaur Rex leaves your graveyard in the process, Kheru Goldkeeper triggers to flood the board with Treasure tokens, which are further doubled thanks to the token-doubling replacement effects of both Adrix and Nev, Twincasters and Bard, King of Dale. Bard, King of Dale also modifies the card draw from cycling Agonasaur Rex, allowing you to cycle repeatedly while sacrificing the generated Treasures to fund the loop's mana cost and net an endless surplus of resources.