Seedship Broodtender, Phyrexian Altar, Reveillark, and Boss's Chauffeur

Prerequisites

• Seedship Broodtender on the battlefield
• Phyrexian Altar on the battlefield
• Reveillark in the graveyard
• Boss's Chauffeur in the graveyard

Steps

1. Activate Phyrexian Altar by sacrificing Reveillark, adding
2. When Reveillark dies, it triggers, returning Seedship Broodtender and Boss's Chauffeur from your graveyard to the battlefield
3. Boss's Chauffeur will enter with a +1/+1 counter on it equal to the number of creatures you control
4. When Seedship Broodtender enters, it and Boss's Chauffeur trigger
5. Resolve the Boss's Chauffeur trigger, putting a +1/+1 counter on Boss's Chauffeur
6. Resolve the Seedship Broodtender trigger, causing you to mill three cards
7. Activate Phyrexian Altar by sacrificing Boss's Chauffeur, adding
8. When Boss's Chauffeur dies, it triggers, creating a 1/1 Citizen creature token for each +1/+1 counter on it
9. Activate Phyrexian Altar three times by sacrificing three Citizens, adding
10. Activate Seedship Broodtender by paying and sacrificing it, returning Reveillark from your graveyard to the battlefield
11. When Reveillark enters, [[sister]] triggers, causing you to gain 1 life
12. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-mill
• Infinite creature tokens
• Infinite +1/+1 counters on a creature