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Data:Cards/Circle of Healing(38), Data:Cards/Circle of Healing(465042)
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It isn't really a circle.
Circle of Healing is a common expert priest spell card.
How to get
Circle of Healing can be obtained through Classic card packs, through crafting, or as an Arena reward.
| Card | Crafting cost | Disenchanting |
|---|---|---|
| Circle of Healing | 40 | 5 |
| Golden Circle of Healing | 400 | 50 |
Strategy
This is a cheap but powerful heal for priests, with the major downside of affecting all minions including your opponent's. While potentially extremely useful, the right circumstances are therefore required to make the most of this spell.
Ideally, use this spell when all of your opponent's minions (if any) are at full health, and when you have several damaged minions on the board. Remember that healing does not benefit full-health minions, so the only significant factor is the number of damaged minions are on the board.
The card can also be changed by 
Auchenai Soulpriest to deal massive damage to all minions. Another play involves several damaged minions and Northshire Cleric; this spell can then be used to heal friendly and enemy minions alike, with the undesirable healing compensated for by the substantial card draw.
History
Circle of Healing is a Holy priest healing spell from World of Warcraft. It is a self-targeting 'smart-heal' which heals the 5 most injured party members within 30 yards of the target for a small amount. While its 'smart-heal' effect is useful for saving the priest time selecting individual targets, it also prevents the priest from deciding who will benefit from this spell. This aspect of the ability is exaggerated in its Hearthstone card's trait of affecting all minions, while the WoW spell only affects friendly party members.
As an instant auto-targeting multi-target heal, Circle of Healing is extremely effective when the priest is unable to output enough healing through other means, and consequently comes with a cooldown, added in Wrath of the Lich King after constant spamming of this ability became a common strategy for Holy priests. In the current game, the spell is a powerful instant AoE healing option for Holy priests.