Taht, Titan of Inferno's Joke

When Taht enters the battlefield enters sacrifice
it unless it escaped.
When Taht Enters the battlefield or attacks exile
the top 2 cards of your library, you may cast them
until your next turn for {1} less to cast, for each
land exiled this way deals 2 damage to target
player.
Escape:{r}{r}{r}{r}, exile five other cards from your graveyard.