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{{version034}}
{{flavour|It may return the magic spent to cast spells, but lowers their success rate. It always returns the magic spent on miscasts.}}

The '''Energy''' [[ego]] occasionally [[channel|refunds MP]] when casting spells. It can only be found on [[orb]]s.

When successfully casting a spell, this ego gives a <code>15% + 30*[[Evocations]]/27</code> chance to have the full MP cost refunded. When you [[miscast]] a spell, you will always have MP refunded. However, it increases your ''raw'' [[spell failure]] chance by +10%, added. (For reference, the first stack of [[wizardry]] reduces raw spell failure by x75%.)

Note that this does not mean that your spell failure actually increases by +10%, as its modified by a function. See the [[Spell Success#Final Step|Spell Success]] page for details. For example:
*If you have a spell with 6% failure, an orb of energy increases it to 17% actual failure.
*If you have a spell with 2% failure, an orb of energy increases it to 8% actual failure.
*For spells with 1% failure, it varies depending on your casting ability. A 1% failure might increase to 2% or 9% actual failure.

Orbs of energy do nothing for [[Djinni]]; there is no benefit or penalty. Djinn of [[Ashenzari]] can use them as a placeholder item for an extra curse if they don't have a [[shield]] yet.

==See also==
*[[Crystal ball of Wucad Mu]]

==History==
*Prior to [[0.34]], the chance of recovering MP on successful cast was 20%; it did not depend on Evocations.
*Prior to [[0.30]], channeling was different, You had a <code>2 * Evocations / 108</code> chance to regain MP on any cast. Each time this happens, the channel could "backfire" - you have a <code>1 / (Evocations - MP cost)</code> chance of either being confused for <code>1 + 1d4</code> turns or losing 1-5 [[intelligence]]. It did not increase failure rate.
*This ego was introduced, along with orbs, in [[0.28]].

{{orb}}

Energy - Revision history

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