name=Helm of Obedience
image=https://magiccards.info/scans/en/ai/163.jpg
value=4.369
rarity=R
type=Artifact
cost={4}
timing=artifact
requires_groovy_code
oracle={X}, {T}: Target opponent puts cards from the top of his or her library into his or her graveyard until a creature card or X cards are put into that graveyard this way, whichever comes first. If a creature card is put into that graveyard this way, sacrifice Helm of Obedience and put that card onto the battlefield under your control. X can't be 0.
