Repository Skaab + Time Walk + Muldrotha, the Gravetide

Repository Skaab

Time Walk

Muldrotha, the Gravetide

How it works

1. Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Repository Skaab either from your hand or from your graveyard by paying 3.
3. When Repository Skaab enters, its exploit ability triggers, causing you to sacrifice it.
4. Repository Skaab's second ability triggers, returning Time Walk from your graveyard to your hand.
5. Repeat each turn.