Yenna, Redtooth Regent + Chatterfang, Squirrel General + Ashnod's Altar + Auratog

Yenna, Redtooth Regent

Chatterfang, Squirrel General

Ashnod's Altar

Auratog

How it works

1. Activate Yenna by paying 2 and tapping it, creating a token copy of an Aura you control and a 1/1 Squirrel creature token, then untapping Yenna and causing you to scry 2.
2. Activate Ashnod's Altar by sacrificing the Squirrel, adding CC.
3. Activate Auratog by sacrificing the Aura token, giving Auratog +2/+2 until end of turn.
4. Repeat.

This looping machinery relies on Yenna, Redtooth Regent duplicating an Aura you already control, which triggers Chatterfang, Squirrel General's replacement effect to double your production by spitting out an extra 1/1 Squirrel alongside the new enchantment copy. Because Yenna's copied Aura untaps her upon creation, you can immediately feed the newly manifested token to Auratog while funneling the accompanying Squirrel straight into Ashnod's Altar for the exact mana needed to restart the cycle. By sacrificing the copy to Auratog before it can disrupt your unique-name constraints, you endlessly generate infinite enter-the-battlefield and death triggers while growing your beast to astronomical proportions.