The Bloodsky Massacre

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) [I] Create a 2/3 red Demon Berserker creature token with menace. [II] Whenever a Berserker attacks this turn, you draw a card and you lose 1 life. [III] Add R for each Berserker you control. Until end of turn, you don't lose this mana as steps and phases end.