River Song + Wheel of Sun and Moon + Walk the Aeons

River Song

Wheel of Sun and Moon

Walk the Aeons

How it works

1. Cast Walk the Aeons by paying 4, causing you to take an extra turn after this one.
2. Walk the Aeons is put on the bottom of your library instead of into your graveyard due to Wheel of Sun and Moon.
3. Move to your extra turn, drawing Walk the Aeons from the bottom of your library during your draw step due to River Song.
4. Repeat.

This clever loop sets up an infinite turn engine by fundamentally altering how your library interacts with your graveyard. With Wheel of Sun and Moon enchanting you, casting Walk the Aeons ensures that the spell neatly bypasses your graveyard entirely, getting tucked right onto the bottom of your library instead. Meanwhile, River Song completely inverts your draw mechanics so that you naturally draw from the bottom of your library rather than the top. This means that at the start of your extra turn, you will always draw Walk the Aeons right back into your hand, ready to be cast all over again.