Eternal Witness + Followed Footsteps + Walk the Aeons

Eternal Witness

Followed Footsteps

Walk the Aeons

How it works

1. Cast Walk the Aeons by paying 4, taking an extra turn after this one.
2. Move to your next turn.
3. At the beginning of your upkeep, Followed Footsteps triggers, creating a copy of Eternal Witness.
4. Eternal Witness enters the battlefield, returning Walk the Aeons from your graveyard to your hand.
5. Repeat.