Yenna, Redtooth Regent + Peregrin Took + Krark-Clan Ironworks + Auratog

Yenna, Redtooth Regent

Peregrin Took

Krark-Clan Ironworks

Auratog

How it works

1. Activate Yenna by paying 2 and tapping it, creating a token copy of an Aura you control and a Food artifact token, then untapping Yenna and causing you to scry 2.
2. Activate Krark-Clan Ironworks by sacrificing the Food, adding CC.
3. Activate Auratog by sacrificing the Aura token, giving Auratog +2/+2 until end of turn.
4. Repeat.

This clever loop relies on Yenna, Redtooth Regent duplicating an Aura while Peregrin Took turns that single token creation into both the Aura copy and an extra Food token. You then use Krark-Clan Ironworks to sacrifice the Food for {C}{C}, providing the mana needed to pay for Yenna's activation again. Finally, Auratog steps in to consume the newly created Aura token, fueling its own +2/+2 pump while clearing the board so Yenna can safely target the original Aura once more.