Godzilla, Kaiju King

If you would lose unspent mana, that mana
becomes black instead.
At the beginning of your precombat main phase,
look at the top card of your library. You may
reveal that card if it has three or more colored
mana symbols in its mana cost. If you do, add
three mana in any combination of its colors and
put it into your hand. If you don't reveal it, put
it into your hand.