Herald of Kozilek

Commanders that run Herald of Kozilek most

Deck counts from EDHREC.

• Ulalek, Fused Atrocity: 13,428 decks
• Azlask, the Swelling Scourge: 6,062 decks
• Jhoira, Weatherlight Captain: 1,648 decks

Often played with Herald of Kozilek

Cards that show up in the same decks on EDHREC.

• Cultivator Drone
• Ruination Guide
• Vile Aggregate
• Molten Nursery
• Tide Drifter
• It That Heralds the End
• Eldrazi Linebreaker
• Barrage Tyrant
• Prophet of Distortion
• Brood Birthing

Rulings

• 2015-08-25: Herald of Kozilek's last ability can't reduce the amount of colored mana you pay for a spell. It reduces only the generic component of that mana cost.
• 2015-08-25: If there are additional costs to cast a spell, or if the cost to cast a spell is increased by an effect, apply those increases before applying cost reductions.
• 2015-08-25: 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.
• 2015-08-25: 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.
• 2015-08-25: 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.
• 2015-08-25: The cost reduction can apply to alternative costs.
• 2015-08-25: If a colorless spell you cast has {X} in its mana cost, you choose the value of X before calculating the spell's total cost. For example, if that spell's mana cost is {X}, you could choose 5 as the value of X and pay {4} to cast the spell.
• 2015-08-25: A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
• 2015-08-25: Devoid works in all zones, not just on the battlefield.
• 2015-08-25: Herald of Kozilek's last ability doesn't change the mana cost or mana value of any spell. It changes only the total cost you actually pay.