Nesting Dragon + Bladewing's Thrall + Ashaya, Soul of the Wild + Thaumatog
Nesting Dragon
Bladewing's Thrall
Ashaya, Soul of the Wild
Thaumatog
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite creature tokensInfinite landfall triggersInfinitely large creature until end of turn
How it works
Cast Bladewing's Thrall by paying 2.
When Bladewing's Thrall enters, Nesting Dragon triggers, as Bladewing's Thrall is a land due to Ashaya.
Holding priority, activate Thaumatog by sacrificing Bladewing's Thrall.
Resolve the Nesting Dragon trigger, creating a 0/2 Dragon Egg creature token.
When the Dragon Egg enters, Bladewing's Thrall triggers, returning itself from your graveyard to the battlefield.