Myrel, Shield of Argive, Lithoform Engine, Dross Scorpion, and Ashnod's Altar

Prerequisites

• Myrel, Shield of Argive on the battlefield
• Lithoform Engine on the battlefield
• Dross Scorpion on the battlefield
• Ashnod's Altar on the battlefield
• You control at least two Soldiers
• Myrel does not have summoning sickness
• available

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 Ashnod's Altar by sacrificing a Soldier, adding
5. When the Soldier dies, Dross Scorpion triggers, untapping Lithoform Engine
6. Repeat from step 2

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana artifacts you control can produce
• Infinite sacrifice triggers
• Infinite untap of artifacts you control