Scaretiller, Vesuva, Gods' Eye, Gate to the Reikai, Retreat to Coralhelm, and Earthcraft

Prerequisites

• Scaretiller on the battlefield
• Vesuva in the graveyard
• Gods' Eye, Gate to the Reikai on the battlefield
• Retreat to Coralhelm on the battlefield
• Earthcraft on the battlefield
• You control at least one basic land

Steps

1. Activate Earthcraft by tapping Scaretiller, targeting any basic land you control
2. Scaretiller triggers, returning Vesuva from your graveyard to the battlefield as a copy of Gods' Eye
3. Put Vesuva into your graveyard due to the legend rule
4. Vesuva and Retreat to Coralhelm trigger
5. Resolve the Retreat to Coralhelm trigger, untapping Scaretiller
6. Resolve the Vesuva trigger, creating a 1/1 Spirit creature token
7. Resolve the Earthcraft ability from step 1, untapping the basic land
8. Activate the basic land by tapping it, adding
9. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite landfall triggers
• Infinite mana basic lands you control can produce
• Infinite untap of basic lands you control