Activate Reckoner Bankbuster by paying {2}, tapping it, and removing a charge counter from it, causing you to draw a card, create a Treasure artifact token and create a 1/1 Pilot creature token.
Activate Coretapper's first ability by tapping it, putting a charge counter on Reckoner Bankbuster.
Activate Ashnod's Altar by sacrificing the Pilot token, adding {C}{C}.
When the Pilot dies, Coretapper and Reckoner Bankbuster triggers, untapping themselves.
Repeat.

Infinite card draw

Infinite draw triggers

Near-infinite colored mana

Near-infinite colorless mana

Near-infinite death triggers

Near-infinite creature ETB

Near-infinite creature LTB

Near-infinite creature sacrifice triggers

Near-infinite Treasure tokens

Reckoner Bankbuster

Coretapper

Ashnod's Altar

Thornbite Staff

Sculpting Steel

Activate Reckoner Bankbuster by paying {2}, tapping it, and removing a charge counter from it, drawing a card, creating a Treasure token and a 1/1 Pilot creature token.
When the Pilot enters the battlefield, Intruder Alarm triggers.
Holding priority, if Reckoner Bankbuster is not a creature, activate its crew ability by tapping the Pilot, causing Reckoner Bankbuster to become an artifact creatures until end of turn.
Resolve the Intruder Alarm trigger, untapping all creatures.
Activate Coretapper's first ability by tapping it, putting a charge counter on Reckoner Bankbuster.
Activate Ashnod's Altar by sacrificing the Pilot token, adding {C}{C}.
Repeat.

Combos with "Reckoner Bankbuster"