Hashaton, Scarab's Fist + Mind Over Matter + Coveted Jewel + Elvish Regrower

Hashaton, Scarab's Fist

Mind Over Matter

Coveted Jewel

Elvish Regrower

How it works

1. Activate Coveted Jewel by tapping it, adding .
2. Activate Mind Over Matter by discarding Elvish Regrower.
3. Hashaton triggers, causing you to pay 2 to create a tapped token copy of Elvish Regrower that is a 4/4 Zombie.
4. When the Elvish Regrower token enters the battlefield, it triggers, returning Elvish Regrower from your graveyard to your hand.
5. Resolve the Mind Over Matter ability, untapping Coveted Jewel.
6. Repeat.