Requires

Myrel, Shield of Argive must be on the battlefield. Lithoform Engine must be on the battlefield. Clock of Omens must be on the battlefield. Krark-Clan Ironworks must be on the battlefield. Mana needed:

Steps

1. Declare Myrel as an attacker, triggering its ability.
2. Holding priority, activate Lithoform Engine's first ability by paying and tapping it, copying Myrel's ability.
3. Resolve the copy of Myrel's ability, creating at least two 1/1 Soldier artifact creature tokens.
4. Activate Clock of Omens by tapping two Soldiers, untapping Lithoform Engine.
5. Activate Krark-Clan Ironworks by sacrificing a Soldier, adding .
6. Repeat from step 2.

Results