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.)
4/4
Illustrated by
Store Championships#25RareEnglishLegality
Rulings
Jul 14, 2017
Hollow One’s cost is reduced even if the cards you’ve cycled or discarded aren’t in your graveyard.
Jul 14, 2017
Once you’ve discarded three cards, Hollow One costs 
to cast. It won’t stop at 
or cost negative amounts of mana.
Jul 14, 2017
Hollow One’s first ability doesn’t give you permission to discard cards. You’ll need another effect that instructs or allows you to discard them.