Karsus, Momentary God

Netherese Magic - a player losing unspent mana
causes that player to lose that much life
{x}, {t}: - Each player adds X mana of any one
color to their mana pool and all cards gain
flash until end of turn. Players draw or discard
cards until they have 10 cards in their hand
and then cant draw anymore cards this turn.
At the end of your turn, exile this card.
''Even for just a moment, I will a God''