Whenever another artifact you control enters, put a +1/+1 counter on this creature. If that artifact is a Contraption, this creature gains lifelink until end of turn.
"My sword is at your service, as are my scissors, corkscrew, and bottle opener."
Illustrated by Ben Wootten · The List (Unfinity Foil Edition) · #5
There are no rulings for Jackknight.