Thok, Living Apocalypse

When Thok, Living Apocalypse enters the battlefield, destroy all creatures, enchantments, artifacts, or lands. Each player loses six life. At
the beginning of each player's upkeep, that player
loses three life, and discards a card.
Sacrifice Thok, Living Apocalypse: Search your library for a creature card. Put it onto the battlefield.
{t}: Add {u}{b}{r} to your mana pool.