Hollow One 
Artifact Creature — Golem
This spell costs 
less to cast for each card you've cycled or discarded this turn.
Cycling (, Discard this card: Draw a card.)
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL