Urban Daggertooth + Herd Baloth + Warstorm Surge

Prerequisites

• You have a way to give Urban Daggertooth indestructible.
• You have a way to put a +1/+1 counter on Herd Baloth.

Steps

1. 1Give Urban Daggertooth indestructible.
2. 2Put a +1/+1 counter on Herd Baloth.
3. 3Herd Baloth triggers, creating a 4/4 Beast creature token.
4. 4The Beast enters the battlefield, triggering Warstorm Surge, dealing 4 damage to Urban Daggertooth.
5. 5Urban Daggertooth triggers, putting a +1/+1 counter on Herd Baloth.
6. 6Repeat from step 3.

Effects

• Infinite +1/+1 counters on most creatures you control
• Infinite creature ETB
• Infinite creature tokens
• Infinite proliferate