Emry, Lurker of the Loch, Jeskai Ascendancy, Orcish Mechanics, and Cathar's Shield

Prerequisites

• Emry, Lurker of the Loch on the battlefield
• Jeskai Ascendancy on the battlefield
• Orcish Mechanics on the battlefield
• Cathar's Shield on the battlefield
• Emry and Orcish Mechanics do not have summoning sickness

Steps

1. Tap Orcish Mechanics, sacrificing Cathar's Shield to deal 2 damage to any target
2. Tap Emry, targeting Cathar's Shield
3. Cast Cathar's Shield
4. Jeskai Ascendancy triggers, allowing you to loot
5. Jeskai Ascendancy triggers, untapping all creatures you control and giving them +1/+1 until end of turn
6. Repeat

Results

• Infinite damage
• Infinite looting
• Infinitely large creatures until end of turn
• Infinite storm count
• Infinite untap