Krenko, Baron of Tin Street, Crime Novelist, Sword of the Meek, and Extruder

Prerequisites

• Krenko, Baron of Tin Street on the battlefield
• Crime Novelist on the battlefield
• Sword of the Meek on the battlefield
• Extruder on the battlefield

Steps

1. Activate Extruder by sacrificing Sword of the Meek
2. Crime Novelist and Krenko trigger
3. Resolve the Crime Novelist trigger, adding and putting a +1/+1 counter on the Crime Novelist
4. Resolve the Krenko trigger, causing you to pay to create a 1/1 Goblin creature token with haste
5. When the Goblin enters the battlefield, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Goblin token
6. Resolve the Extruder ability from step 1
7. Repeat

Results

• Infinite creature ETB
• Infinite creature tokens with haste
• Infinite +1/+1 counters on creatures you control