Requires

Clock of Omens must be on the battlefield. Mycosynth Lattice must be on the battlefield. Shrieking Drake must be in hand. Battered Golem must be on the battlefield. You control a permanent that can tap to produce at least .

Steps

1. Activate a permanent you control by tapping it, adding at least .
2. Cast Shrieking Drake by paying .
3. Shrieking Drake enters the battlefield, triggering itself and Battered Golem.
4. Resolve the Battered Golem trigger, untapping it.
5. Activate Clock of Omens by tapping Battered Golem and Shrieking Drake, untapping the mana-producing permanent.
6. Resolve the Shrieking Drake trigger from step 3, returning itself from the battlefield to your hand.
7. Repeat.

Results