Time Walk + Seasons Past + Dark Petition

Time Walk

Seasons Past

Dark Petition

How it works

1. Cast Seasons Past by paying 4, returning Dark Petition, Time Walk, and any number of cards with different mana costs to your hand and putting Seasons Past on the bottom of your library.
2. Cast Dark Petition by paying 3, putting Seasons Past from your library into your hand.
3. Cast Time Walk by paying 1, granting you an extra turn.
4. Repeat each turn.