Combine Guildmage, and Bartolomé del Presidio

Prerequisites

• Combine Guildmage on the battlefield
• Bartolomé del Presidio on the battlefield
• available

Steps

1. Activate Combine Guildmage's first ability by paying and tapping it
2. Activate Bartolomé del Presidio by sacrificing the persist creature
3. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Combine Guildmage
4. Resolve the Bartolomé del Presidio ability
5. Repeat from step 2

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite creature sacrifice triggers