Moss-Pit Skeleton triggers, putting it from your graveyard onto the top of your library.
Kheru Goldkeeper triggers, creating a Treasure token.
When the Treasure enters the battlefield, Skyswimmer Koi and Cloakwood Swarmkeeper trigger.
Resolve the Skyswimmer Koi trigger, drawing Moss-Pit Skeleton from your library, and then discarding it.
Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
Repeat from step 2.
This clever loop transforms a simple counter placement into an endless engine of card-drawing and artifact generation. It all hinges on Moss-Pit Skeleton waiting in your graveyard, ready to leap to the top of your library whenever counters land on your creatures. Once drawn and discarded back into the graveyard by Skyswimmer Koi—triggered by the Treasure token created through Kheru Goldkeeper reacting to the Skeleton leaving your graveyard—the cycle resets itself completely. Along the way, Cloakwood Swarmkeeper happily grows with every single token that enters, turning this intricate chain into an absolute storm of value.