Scurry Oak + Intruder Alarm + Steel Overseer + Liquimetal Torque

Prerequisites

• Steel Overseer does not have summoning sickness.

Steps

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

Effects

• Infinite +1/+1 counters on certain creatures
• Infinite creature ETB
• Infinite creature tokens
• Infinite mana creatures you control can produce
• Infinite untap of creatures