Walk the Aeons + Seasons Past + Demonic Tutor

Walk the Aeons

Seasons Past

Demonic Tutor

How it works

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