Activate Lonis by paying 2 and sacrificing another artifact.
If the artifact was a Clue, Lonis' third ability triggers, putting two +1/+1 counters on any other creature you control.
Resolve the Lonis ability, putting two +1/+1 counters on it and causing you to draw a card.
Lonis' second ability triggers, creating two Clue artifact tokens.
Activate Krark-Clan Ironworks by sacrificing a Clue, adding CC.
Lonis' third ability triggers, putting two +1/+1 counters on any other creature you control.
Repeat.
This elegant loop turns the modest mechanical demands of Clan Crafter into a self-sustaining engine of growth and discovery. By granting Lonis, Genetics Expert an activated ability to sacrifice artifacts for counters and cards, Clan Crafter sets the stage for Hardened Scales to step in and amplify every counter placed—ensuring that sacrificing a Clue to fund the ability or cashing one in via Krark-Clan Ironworks yields more resources than it costs. As Krark-Clan Ironworks converts those newly generated Clues into raw colorless mana, Lonis translates the resulting counter placements into fresh Clue tokens, fueling a continuous cascade of infinite card draw and near-infinite +1/+1 counters.