Brain of the One

Instead of paying Brain of the One's mana cost, you may pay 10 life, or discard your hand activate this only if you have 7 or more cards
Opponents play with there hand revealed,
{t} Reveal the top card of target players deck: if its a creature card you may cast it without paying its mana cost, exile it at the next endstep.If its a instant or sourcery, you may cast it without paying its mana cost