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Masterpiece! full
The subject of this article is unused. It is present in the Hearthstone client, but has never been used in-game, or has been archived after being used.
This article may contain spoilers. Read at your own risk!
The subject of this article is unused. It is present in the Hearthstone client, but has never been used in-game, or has been archived after being used.
This article may contain spoilers. Read at your own risk!


Release Coolant is an unused Tavern Brawl card. It is speculated to have been designed as part of the Unite Against Mechazod! Brawl.

There are several reasons for this speculation. The card's function targets all minions, something which is rarely desirable, but makes sense during the Mechazod Brawl, where both players unite to fight the boss. The card also grants a permanent +2 Attack to the casting hero, something which months later has only been seen on one other card - Overclock, itself a card from the Mechazod Brawl. The title and spell concept appears to refer to a mechanical item or being. Finally, the card was added at the same time as the other Mechazod cards, and months later has still not been seen in-game.

Tavern Brawls[]

Unite Against Mechazod!

Unite Against Mechazod!

Trivia[]

Gallery[]

Release Coolant full

Release Coolant, full art

Patch changes

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