$0.03
Kozilek's Sentinel 
Creature — Eldrazi Drone
Battle for Zendikar Common
Devoid (This card has no color.)
Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.
Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.
It moves through the tunnels as slowly and surely as the shifting stones.
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#129 — Illus. Raymond Swanland