Kozilek's Sentinel

Card Name

Kozilek's Sentinel

Mana Cost

1

Type

Creature – Eldrazi Drone

Rarity

Common

rules Text

Devoid (This card has no color.)Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.

Flavor Text

It moves through the tunnels as slowly and surely as the shifting stones.

Legal Formats

Commander, Legacy, Modern, Pauper, Pioneer, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Standard

Rulings

(8/25/2015)
Cards with devoid use frames that are variations of the transparent frame traditionally used for Eldrazi. The top part of the card features some color over a background based on the texture of the hedrons that once imprisoned the Eldrazi. This coloration is intended to aid deckbuilding and game play.
(8/25/2015)
A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
(8/25/2015)
Other cards and abilities can give a card with devoid color. If that happens, it's just the new color, not that color and colorless.
(8/25/2015)
Devoid works in all zones, not just on the battlefield.
(8/25/2015)
If a card loses devoid, it will still be colorless. This is because effects that change an object's color (like the one created by devoid) are considered before the object loses devoid.