Archaeomancer + Cache Raiders + Time Warp

Archaeomancer

Cache Raiders

Time Warp

How it works

1. Cast Time Warp by paying 3, taking an extra turn after this one.
2. Cast Archaeomancer by paying 2.
3. Archaeomancer enters the battlefield, returning Time Warp to your hand.
4. Move to your next turn.
5. At the beginning of your next upkeep, Cache Raiders triggers, returning Archaeomancer to your hand.
6. Move to your next turn.
7. Repeat.