kouriko, the honourless

youriko, the honourless gets +1/+1 each time a card
is discarded
{x}{u}{u}{b}{b}{t} youriko, the honourless deals x damage to each creature, your opponent discards 3 cards out of their hand, then discard the top cards of their library until they discard x sorcery cards. you may play the sorcery cards without their mana cost. the card with the highest converted mana cost can be cast twice, by you and you gain life equal to its converted mana cost.