Energy

The Energy ego occasionally refunds MP when casting spells. It can only be found on orbs.

When successfully casting a spell, this ego gives a 15% + 30*Evocations/27 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 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 2 * Evocations / 108 chance to regain MP on any cast. Each time this happens, the channel could "backfire" - you have a 1 / (Evocations - MP cost) chance of either being confused for 1 + 1d4 turns or losing 1-5 intelligence. It did not increase failure rate.
• This ego was introduced, along with orbs, in 0.28.