Vessel of Endless Rest
{3}
Artifact
Oracle Text
When this artifact enters, put target card from a graveyard on the bottom of its owner's library.
{T}: Add one mana of any color.
Watch Out
ETB trigger, not a cast triggerRules Note
This card's ability triggers when it enters the battlefield, not when it's cast. Effects that double ETB triggers (like Panharmonicon) work here. Countering the spell prevents the creature from entering, so the ETB won't fire.