Dragonback Assault, Bladewing's Thrall, Ashaya, Soul of the Wild, and Thaumatog

Prerequisites

• Dragonback Assault on the battlefield
• Bladewing's Thrall in hand
• Ashaya, Soul of the Wild on the battlefield
• Thaumatog on the battlefield
• available

Steps

1. Cast Bladewing's Thrall by paying
2. When Bladewing's Thrall enters, Dragonback Assault triggers, as Bladewing's Thrall is a land due to Ashaya
3. Holding priority, activate Thaumatog by sacrificing Bladewing's Thrall
4. Resolve the Dragonback Assault trigger, creating a 4/4 Dragon creature token
5. When the Dragon enters, Bladewing's Thrall triggers, returning itself from your graveyard to the battlefield
6. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite creature tokens
• Infinite landfall triggers
• Infinitely large Thaumatog until end of turn