Maleceptor, Psychic Brute

When Maleceptor, Psychic Brute enters
the battlefield, mill six cards. You may put
a card with {x} in its mana cost from among
them into your hand.
{t}: Reveal any number of cards with X in
their mana cost into your hand. Add {c}{c}
for each card revealed this way. Spend this
mana only on costs that contain {x}.