Agatha's Soul Cauldron + Anti-Venom, Horrifying Healer + Deathbringer Thoctar + The Rollercrusher Ride

RWB identity

Commander legal

The 4 combo pieces

• Agatha's Soul Cauldron
• Anti-Venom, Horrifying Healer
• Deathbringer Thoctar
• The Rollercrusher Ride

What must be in place

There are four or more card types among cards in your graveyard.

How to execute it

1. Activate Anti-Venom using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, targeting itself and putting two +1/+1 counters on it due to its replacement effect and The Rollercrusher Ride.
2. Activate Anti-Venom using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
3. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite damage