Cast Trickery Charm by paying , giving Weftstalker Ardent the Pirate creature type until end of turn.
Cause an artifact to enter the battlefield under your control.
Weftstalker Ardent triggers, dealing 1 damage to each opponent.
Malcolm triggers, as Weftstalker Ardent is a Pirate due to Trickery Charm, creating a Treasure token for each opponent dealt damage this way.
When the Treasure(s) enter, Weftstalker Ardent triggers that many times.
Resolve the first Weftstalker Ardent trigger, dealing 1 damage to each opponent.
Repeat from step 4.
This brilliant loop turns a clever type-changing trick into a self-sustaining engine of destruction. By casting Trickery Charm, you temporarily turn Weftstalker Ardent into a Pirate so that it synergizes with Malcolm, Keen-Eyed Navigator. Once you prime the loop with any artifact entering the battlefield, Weftstalker Ardent's ability deals damage to your opponents, which prompts Malcolm, Keen-Eyed Navigator to reward you with Treasure tokens. Those very same Treasures entering the battlefield trigger Weftstalker Ardent all over again, creating an endless cascade of damage, mana, and tokens that will quickly overwhelm the table.