Herd Baloth, Intruder Alarm, Steel Overseer, and Liquimetal Torque

Prerequisites

• Herd Baloth on the battlefield
• Intruder Alarm on the battlefield
• Steel Overseer on the battlefield
• Liquimetal Torque on the battlefield
• Steel Overseer does not have summoning sickness

Steps

1. Activate Liquimetal Torque's first ability by tapping it, causing Herd Baloth to become an artifact creature until end of turn
2. Activate Steel Overseer by tapping it, putting +1/+1 counter on each artifact creature you control
3. Herd Baloth triggers, creating a 4/4 Beast creature token
4. The Beast enters the battlefield, triggering Intruder Alarm, untapping all creatures
5. Repeat from step 2

Results

• Infinite +1/+1 counters on Herd Baloth and artifact creatures you control
• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures