Dark Lord, Bushi of Caldaia

Lifelink, vigilance, protection from black
When Dark Lord, Bushi of Caldaia enters the battlefield, if it was cast, create 4 tapped 3/3
white Samurai creature tokens.
Whenever Dark Lord leaves play, you may pay
any amount of life, mill any number of cards, and sacrifice any number of permanents, then if these actions total 66, cast it without paying its mana
cost.