Galvanoth
Mirrodin Besieged — rare
Creature — Beast
Galvanoth rulings:
2011-06-01: If the card you look at isn’t an instant or sorcery card, it remains on top of your library. You don’t reveal it.
2011-06-01: You may pay additional costs, such as kicker costs, of the instant or sorcery card.
2011-06-01: If the card has any mandatory additional costs, as Kuldotha Rebirth does, you must pay them in order to cast the spell.
2011-06-01: If the card has an X in its mana cost, you must choose 0 as its value.