Khal-Dun, Dread Admiral

When Khal-Dun, Dread Admiral enters
the battlefield, draw a card.
{t}, discard a blue card: draw a card.
{t}, discard a red card: Khal-Dun, Dread
Admiral, deals damage equal to the discarded
card's converted mana cost to any target.
{t}, discard a black card: target player reveals
their hand. You may choose a nonland card
from it. That player discards that card. You
lose life equal to that card's converted
mana cost.