Josa, Titan of Tundra's Freeze

When Josa enters the battlefield, sacrifice it unless it escaped.
Whenever Josa enters the battlefield or attacks, tap up to two target permanents an opponent controls. Those permanents don't untap during their controller's next untap step.
Escape - {u}{u}{u}{u}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)