Elemental Mastery, Galvanic Juggernaut, and Goblin Bombardment

Prerequisites

• Elemental Mastery on the battlefield
• Galvanic Juggernaut on the battlefield
• Goblin Bombardment on the battlefield
• Elemental Mastery attached to Galvanic Juggernaut
• Galvanic Juggernaut does not have summoning sickness

Steps

1. Activate Galvanic Juggernaut by tapping it, creating five 1/1 Elemental creature tokens with haste
2. Activate Goblin Bombardment by sacrificing an Elemental
3. The Elemental dies, triggering Galvanic Juggernaut, untapping Galvanic Juggernaut
4. Resolve the Goblin Bombardment ability, dealing 1 damage to any target
5. Repeat

Results

• Infinite creature tokens with haste
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers