Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Boss's Chauffeur + Phyrexian Altar

Prerequisites

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Steps

1. 1Activate Phyrexian Altar by sacrificing Boss's Chauffeur.
2. 2When Boss's Chauffeur dies, its persist ability and second ability trigger.
3. 3Resolve the second trigger, creating a number of 1/1 Citizen creature tokens equal to the number of +1/+1 counters that were on Boss's Chauffeur.
4. 4Resolve the persist trigger, returning Boss's Chauffeur from your graveyard to the battlefield. It'll enter with a number of +1/+1 counters on it equal to the number of creatures you control minus 1 due to its replacement effect.
5. 5Repeat.

Effects

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