Devoted Druid, Presence of Gond, and Cathars' Crusade

Prerequisites

• Devoted Druid on the battlefield
• Presence of Gond on the battlefield
• Cathars' Crusade on the battlefield
• Presence of Gond attached to Devoted Druid
• Devoted Druid does not have summoning sickness

Steps

1. Activate Devoted Druid by tapping it, creating a 1/1 Elf Warrior token
2. Activate Devoted Druid by putting a -1/-1 counter on it, untapping it
3. Repeat

Results

• Infinite +1/+1 counters
• Infinite creature tokens
• Infinite ETB