Origin of the Hidden Ones (#36)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
[I] Origin of the Hidden Ones deals 4 damage to any target.
[II] Create two 1/1 black Assassin creature tokens with menace.
[III] Whenever an Assassin you control attacks this turn, create a 1/1 black Assassin creature token with menace that's tapped and attacking.