Herald of Kozilek (BFZ)

Creature — Eldrazi Drone

Devoid (This card has no color.) Colorless spells you cast cost {1} less to cast.

Reliable cost reducer for colorless-heavy strategies. Herald of Kozilek shaves a mana off every Eldrazi spell and other colorless payoffs, making it a key enabler in dedicated Eldrazi decks across Modern and Pioneer. The three-mana investment pays for itself quickly in a deck built around it, though it requires sufficient colorless payoffs to justify the slot—it's not a standalone accelerant like traditional ramp pieces.

Battle for Zendikar — Uncommon