Puppet Conjurer, Dross Scorpion, and Phyrexian Altar

Prerequisites

• Puppet Conjurer on the battlefield
• Dross Scorpion on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Activate Puppet's Conjurer by paying and tapping it, creating a 0/1 Homunculus artifact creature token
2. Activate Phyrexian Altar by sacrificing the Homunculus, adding
3. When the Homunculus dies, Dross Scorpion triggers, untapping Puppet's Conjurer
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers