mtg clue token cards (015/018) [Shadows over Innistrad Tokens] Sacrifice this artifact Clue Token (Printed) THE FILES

This is easily acquired with a card like the Basilisk Collar, which is worth playing with Casey Jones anyway

Say I am light on Naturlize effects or light on cheap removal or light on instant removal or light on creature kill then brilliant

Legendary Creature - Rogue Aetherborn Marionette Master Fabricate 3 (When this creature enters, put three +1/+1 counters on it or create three 1/1 colorless Servo artifact creature tokens.) Whenever an artifact you control is put into a graveyard from the battlefield, target opponent loses life equal to this creature's power

There are a ton of PKs out there that will tend to kill in a single hit, like Blightsteel Colossus or a Commander with 21 or more power in that format