Myrel, Shield of Argive, Lithoform Engine, Dross Scorpion, and Phyrexian Altar

Prerequisites

• Myrel, Shield of Argive on the battlefield
• Lithoform Engine on the battlefield
• Dross Scorpion on the battlefield
• Phyrexian Altar on the battlefield
• You control at least three 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 Phyrexian Altar twice by sacrificing two Soldiers, adding
5. When the Soldiers die, Dross Scorpion triggers twice, untapping Lithoform Engine and any other artifact you control
6. Repeat from step 2

Results

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