Goblin Welder + Intruder Alarm

UR identity

Commander legal

The 2 combo pieces

• Goblin Welder
• Intruder Alarm

What must be in place

Goblin Welder does not have summoning sickness.
You control at least one nontoken artifact creature.
You have at least one artifact creature in your graveyard.

How to execute it

1. Activate Goblin Welder by tapping it, sacrificing any artifact creature you control and returning any other artifact creature from your graveyard to the battlefield.
2. Intruder Alarm triggers, untapping all creatures.
3. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures