Crossbar Tinkmaster

Whenever a Contraption artifact you control is put into a graveyard from the battlefield, put a +1/+1 counter on Crossbar Tinkmaster.
Remove 2 +1/+1 counters from a Legendary Creature you control: Crossbar Tinkmaster assembles a contraption.
Whenever a Rigger you control assembles a Contraption, Scry 1.