Twilight Drover, Mana Echoes, and Phyrexian Altar

Prerequisites

• Twilight Drover on the battlefield
• Mana Echoes on the battlefield
• Phyrexian Altar on the battlefield
• Twilight Drover has at least one +1/+1 counter on it
• available

Steps

1. Activate Twilight Drover by paying and removing a +1/+1 counter from it, creating two 1/1 Spirit creature tokens
2. The Spirit tokens enter the batlefield, triggering Mana Echoes twice, adding at least six
3. Activate Phyrexian Altar by sacrificing a Spirit token, adding
4. Twilight Drover triggers, putting a +1/+1 counter on itself
5. Repeat

Results

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