Activate Peregrin Took by sacrificing three Foods.
Jenny Flint triggers three times.
Resolve the first Jenny Flint trigger, putting a +1/+1 counter on Lonis.
Lonis's first ability triggers, creating a Clue and Food token due to Peregrin Took.
Repeat from step 3 for the remaining triggers.
Resolve the Peregrin Took ability from step 1, causing you to draw a card.
Repeat.

Infinite card draw

Infinite draw triggers

Near-infinite Clue tokens

Near-infinite +1/+1 counters on a creature

Lonis, Genetics Expert

Jenny Flint

Peregrin Took

Activate Krark-Clan Ironworks by sacrificing the Clue, adding {C}{C}.
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.
Repeat.

Infinite colorless mana

Krark-Clan Ironworks

Activate your commander by paying {1} and sacrificing a Clue or Food.
Crime Novelist and Jenny Flint trigger, as well as Lonis' second ability if the sacrificed artifact was a Clue.
Resolve the Crime Novelist trigger, putting a +1/+1 counter on it and adding {R}.
Resolve the Lonis trigger, if applicable, 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, causing you to create a Clue artifact token.
Resolve the ability from step 1, dealing 1 damage to any target.
Repeat.

Infinite damage

Crime Novelist

Street Urchin

Combos with "Jenny Flint"