Infinitely large creature until end of turnInfinite +1/+1 counters on creatures you control
How it works
Activate Megatog by sacrificing the Clue.
Jenny Flint and Lonis' second ability trigger.
Resolve the Lonis trigger, putting a +1/+1 counter on any other creature you control.
Resolve the Jenny Flint trigger, putting a +1/+1 counter on Lonis.
Lonis' first ability triggers, creating a Clue artifact token.
Resolve the Megatog ability, giving it +3/+3 until end of turn.
Repeat.
This clever loop turns the hunger of Megatog into a self-sustaining engine by feeding it Clue tokens. Every time you sacrifice a Clue to pump Megatog, both Jenny Flint and Lonis, Genetics Expert trigger their shared passion for sacrificing clues, triggering mutual +1/+1 counter growth that feeds right back into Lonis's ability to investigate and replace the sacrificed Clue.