Molten Pool

Molten Pool enters the battlefield tapped.
{t}: Add one mana of any color.
{t}: Add {c}{c}. Spend this mana only to cast
Ranged Assassin spells or activate abilities of
Ranged Assassins.
10 XP: Ranged-Assasincycling {3} (Discard this
card: Search your library for a Ranged Assassin card,
reveal it, put it into your hand, then shuffle.)