Like most Magic: The Gathering cards, the value of Clockwork Percussionist depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Duskmourn: House of Horror)
Are MTG cards worth collecting
A Stifle attached to a 3/2 is a decent disruptive card, but the Tidebinder shutting down problematic creatures like Orcish Bowmasters and artifacts like The One Ring has proven to be incredible
Mostly however this is just a very good card
MTG Pandemonium First released 28 years ago in Exodus, Pandemonium is an absolutely devastating MTG card when built around
Card Set(s) -Memorial Collection- [EB-01] CARD VIEW EB01-003 | R | CHARACTER Kid & Killer (Parallel) Attribute Slash/Special Block Icon 2 Type Supernovas/Kid Pirates Effect [Rush] (This card can attack on the turn in which it is played.) [When Attacking] If your opponent has 2 or less Life cards, this Character gains +2000 power during this turn