Tayam, Luminous Enigma, Devoted Druid, Ashnod's Altar, and Putrid Goblin

Prerequisites

• Tayam, Luminous Enigma on the battlefield
• Devoted Druid on the battlefield
• Ashnod's Altar on the battlefield
• Putrid Goblin on the battlefield
• Devoted Druid does not have summoning sickness

Steps

1. Activate Devoted Druid's first ability by tapping it, adding
2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
3. Activate Ashnod's Altar by sacrificing Putrid Goblin, adding
4. Putrid Goblin dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it
5. Activate Tayam by paying , removing a -1/-1 counter from Devoted Druid, and both counters from Putrid Goblin
6. Holding priority, activate Ashnod's Altar by sacrificing Putrid Goblin, adding
7. Repeat steps 3-4 one additional time
8. Activate Ashnod's Altar by sacrificing Putrid Goblin, adding
9. Resolve Tayam's ability from step 5, causing you to mill three cards and returning Putrid Goblin from your graveyard to the battlefield
10. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite green mana
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill
• Put all permanents with mana value three or less from your graveyard and library onto the battlefield