Tayam, Luminous Enigma, Mossborn Hydra, Thaumatog, and Gaea's Cradle

Prerequisites

• Tayam, Luminous Enigma on the battlefield
• Mossborn Hydra on the battlefield
• Thaumatog on the battlefield
• Gaea's Cradle on the battlefield

Steps

1. Activate Gaea's Cradle by tapping it, adding at least
2. Activate Thaumatog by sacrificing Gaea's Cradle
3. Activate Tayam by paying and removing three counters from creatures you control, causing you to mill three cards and return Gaea's Cradle from your graveyard to the battlefield
4. When Gaea's Cradle enters, Mossborn Hydra triggers, doubling the number of +1/+1 counters on it
5. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite green mana
• Infinite landfall triggers
• Infinite self-mill
• Infinitely large creature until end of turn