Sage of the Falls + Golgari Thug + Desecrated Tomb

Sage of the Falls

Golgari Thug

Desecrated Tomb

How it works

1. Cause a non-Human creature to enter the battlefield under your control.
2. Sage of the Falls triggers, causing you to mill four cards, return Golgari Thug from your graveyard to your hand, and discard Golgari Thug.
3. Desecrated Tomb triggers, creating a 1/1 Bat creature token.
4. Repeat from step 2.