Xavier Sal, Infested Captain, Devoted Druid, and Aura of Dominion

Prerequisites

• Xavier Sal, Infested Captain on the battlefield
• Devoted Druid on the battlefield
• Aura of Dominion on the battlefield
• You control at least one creature token
• Aura of Dominion attached to Xavier Sal
• Devoted Druid does not have a -1/-1 counter on it
• Devoted Druid and Xavier Sal do not have summoning sickness

Steps

1. Activate Devoted Druid's first ability by tapping it, adding
2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
3. Activate Xavier Sal's first ability by tapping it and removing a -1/-1 counter from Devoted Druid, creating a copy of any creature token you control
4. Activate Aura of Dominion by paying and tapping the creature token, untapping Xavier Sal
5. Repeat

Results

• Infinite tapped creature tokens