Glissa Sunseeker
Legendary Creature — Elf Warrior
First strike
: Destroy target artifact if its mana value is equal to the amount of unspent mana you have.
"There's a secret at the heart of this world, and I will unlock it."
Brom
Mirrodin (MRD)
• #120Rulings
You need to have the unspent mana before the ability resolves. The ability doesn't allow you to activate mana abilities while it's resolving.
(wotc • 2004-12-01)
The artifact's mana value must be exactly equal to the amount of unspent mana you have when the ability resolves. If there's less mana or more mana, the artifact won't be destroyed.
(wotc • 2004-12-01)
Rulings
You need to have the unspent mana before the ability resolves. The ability doesn't allow you to activate mana abilities while it's resolving.
(wotc • 2004-12-01)
The artifact's mana value must be exactly equal to the amount of unspent mana you have when the ability resolves. If there's less mana or more mana, the artifact won't be destroyed.
(wotc • 2004-12-01)