Kog'maw, Depth's Healer

Deathtouch
When Kog 'Maw, Depth's Healer enters the battlefield, Target opponent exiles the top X
cards of their library. You may play any number
of cards with converted mana cost X or less from
among them without paying their mana costs.
{t}: Exile target land card from a graveyard. Add
one mana of any color. Draw a card.
{3}{u}{b}{g}, Sacrifice 5 permanents you don't own, Sacrifice a {u},{b}, and {g}land: Transform