Goblin Engineer + Crime Novelist + Intruder Alarm

Prerequisites

• You control a nontoken artifact creature with mana value 3 or less.
• You have an artifact creature card in your graveyard with mana value 3 or less.

Steps

1. 1Activate Goblin Engineer by paying , tapping it and sacrificing a nontoken artifact creature with mana value 3 or less, targeting another artifact creature with mana value 3 or less in your graveyard.
2. 2When the artifact creature dies, Goblin Engineer and Crime Novelist triggers, putting a +1/+1 counter on it and adding .
3. 3Resolve the Goblin Engineer ability, returning the targeted artifact creature from your graveyard to the battlefield.
4. 4When the artifact creature enters, Intruder Alarm triggers, untapping all creatures.
5. 5Repeat.

Effects

• Infinite +1/+1 counters on a creature
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures