Oketra's Monument + Tangleroot + Whitemane Lion + Skyshroud Elf

Oketra's Monument

Tangleroot

Whitemane Lion

Skyshroud Elf

How it works

1. Cast Whitemane Lion by paying 1.
2. Oketra's Monument and Tangleroot triggers.
3. Resolve the Oketra's Monument trigger, creating a 1/1 Warrior token.
4. Resolve the Tangleroot trigger, adding .
5. Whitemane Lion enters the battlefield, returning it to your hand.
6. Activate Skyshroud Elf by paying , adding .
7. Repeat.