Rukarumel on the battlefield with "Sliver" chosen.
Steps
Cast
Crookshank Kobolds by paying ({0} magic symbol) , and choosing to pay its replicate cost an arbitrarily large number of times by paying ({0} magic symbol) .
Crookshank Kobolds triggers, creating a copy of it for each time its replicate cost was paid.
Resolve all
Crookshank Kobolds spells, causing the nontoken
Crookshank Kobolds to enter the battlefield, and creating a token copy of it for each time its replicate cost was paid.
Results
Infinite ETB.
Infinite creature tokens.
Metadata
In 6 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).