Chishiro, Compleated Ronin

{Pu}: Exile the top 2 cards of your library. {Pr}{Pr}: You may play target noncreature permanent from exile. For each mana symbol in a cost, you may pay 2 life rather than pay that mana. That permanent enters play with a finality counter. {Pb}{Pb}: Each opponent loses 1 life for each permanent they own with a finality counter on it and you gain 1 life for each permanent you own with a finality counter on it. Use this ability once per turn as a sorcery.