Hoard-Smelter Dragon
Creature — Dragon
Flying
: Destroy target artifact. This creature gets +X/+0 until end of turn, where X is that artifact's mana value.
He collects the precious metals, and then converts the rest to propellant.
Eric Deschamps
Rulings
If the activated ability resolves but the targeted artifact isn't destroyed (perhaps because it has indestructible or it regenerates), Hoard-Smelter Dragon will still get the bonus.
(wotc • 2013-07-01)
If the mana cost of a permanent includes {X}, that X is considered to be 0.
(wotc • 2011-01-01)
If the targeted artifact is an illegal target by the time the activated ability resolves, the ability doesn't resolve. Hoard-Smelter Dragon won't get the bonus.
(wotc • 2011-01-01)
Rulings
If the activated ability resolves but the targeted artifact isn't destroyed (perhaps because it has indestructible or it regenerates), Hoard-Smelter Dragon will still get the bonus.
(wotc • 2013-07-01)
If the mana cost of a permanent includes {X}, that X is considered to be 0.
(wotc • 2011-01-01)
If the targeted artifact is an illegal target by the time the activated ability resolves, the ability doesn't resolve. Hoard-Smelter Dragon won't get the bonus.
(wotc • 2011-01-01)