Toph, the First Metalbender + Haru, Hidden Talent + Stalactite Dagger + Ravenous Intruder

Toph, the First Metalbender

Haru, Hidden Talent

Stalactite Dagger

Ravenous Intruder

How it works

1. Cast Stalactite Dagger by paying 2.
2. When Stalactite Dagger enters, it triggers, creating a 1/1 Shapeshifter creature token with changeling.
3. When the Shapeshifter enters, Haru triggers, earthbending Stalactite Dagger, as it's a land due to Toph.
4. Activate Ravenous Intruder by sacrificing Stalactite Dagger.
5. When Stalactite Dagger dies, Haru triggers, returning Stalactite Dagger from your graveyard to the battlefield.
6. Repeat steps 2 and 3 once.
7. Resolve the Ravenous Intruder ability.
8. Repeat from step 4.

This ingenious loop relies on Toph, the First Metalbender to fundamentally transform every nontoken artifact you control into a land, turning your equipment into a prime target for earthbending. When you cast Stalactite Dagger, its entry triggers the creation of a changeling token, which conveniently counts as an Ally to trip Haru, Hidden Talent's ability and earthbend the Dagger into a creature-land. Because the Dagger is both a permanent and an artifact, you can immediately feed it to Ravenous Intruder's sacrifice ability to pump the Intruder to massive proportions. Best of all, earthbent lands feature a built-in safety net that returns them to the battlefield tapped whenever they die, which Haru leverages to effortlessly recur the Stalactite Dagger so the entire process can begin anew.