Overheal is a new evergreen class mechanic introduced for the Priest class, similar to Combo for Rogue.

Overheal triggers when a minion is healed beyond its maximum health, granting temporary additional health points.

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Cards with the Overheal mechanic are denoted by a lightning bolt icon, indicating the triggered effect.

Overheal effects can activate even if the minion is at full health, not just when it's damaged.

Certain Priest and Druid cards, like "Circle of Healing" and "Renew," synergize especially well with the Overheal mechanic.

Overheal strategies have emerged in recent metas, with players experimenting to maximize the health buffer through healing effects.

Outlasting opponents by sustaining high health levels beyond the normal threshold has become a viable win condition for some Overheal-focused decks.

The introduction of Overheal is part of Blizzard's plan to continue printing healing cards for the Priest class and evolve the mechanic over time.

While only one Overheal card was revealed in the initial Festival of Legends expansion, more are expected to be added to the Core Set in the future.

Overheal provides Priest players with new deckbuilding opportunities, as they look to leverage the temporary health advantage in their gameplay strategies.

The Overheal mechanic adds an additional layer of complexity to Hearthstone's healing interactions, requiring players to consider the health thresholds and potential for extra health generation.

Successful Overheal management can be a key factor in determining the outcome of matches, as players strive to maximize their hero or minion's effective health pool.