Archaeomancer + Crystal Shard + Walk the Aeons

Archaeomancer

Crystal Shard

Walk the Aeons

How it works

1. Cast Walk the Aeons by paying 4, taking an extra turn after this one.
2. Cast Archaeomancer by paying 2.
3. Archaeomancer enters the battlefield, returning Walk the Aeons to your hand.
4. Activate Crystal Shard by paying and tapping it, returning Archaeomancer to your hand.
5. Move to your next turn.
6. Repeat.