Ultron, Unlimited, Prowler, Clawed Thief, and Phyrexian Altar

Prerequisites

• Ultron, Unlimited in hand or in the command zone
• Prowler, Clawed Thief on the battlefield
• Phyrexian Altar on the battlefield
• plus commander tax if applicable available

Steps

1. Cast Ultron either from your hand or from the command zone by paying plus commander tax if applicable
2. When Ultron enters, Prowler triggers, causing it to connive
3. Ultron triggers, causing you to pay to create a 2/2 Robot Villain creature token
4. When the Robot Villain enters, Prowler triggers
5. Holding priority, activate Phyrexian Altar by sacrificing the Robot Villain, adding
6. Resolve the Prowler ability, causing it to connive
7. Repeat from step 3

Results

• Infinite draw triggers
• Infinite looting
• Infinite self-discard triggers
• Near-infinite +1/+1 counters on a creature
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers