Erash Ir-Ezmir, Harbinger

{t}, Sacrifice X creatures: The controller of this
creature gains X Omen counters.
{t}, Discard X cards: The controller of this
creature gains X Omen counters.
{t}, Remove 6 Omen counters: Put
Ashkira, Mother of Nightmares onto
the battlefield from any zone without
paying her mana cost.