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# Winter Orb
[[Winter Orb]] is a channelling skill (a spell). Channeling the skill charges up an orb, which fires icy projectiles to deal cold damage enemies, which target the ground to deal area of effect damage.

## Skill functions and interactions
While Winter Orb has the Projectile keyword, testing shows it appears to gain no benefit from the [[Fork Support]], [[Pierce Support]], or [[Chain Support]] gems, even though the Active Skills window shows them as compatible. Firing projectiles in a nova with [[Sire of Shards]] causes multiple projects to launch spread out as expected but land not exactly the same distance away from the caster.

## Math
**Projectile hit rate**

Base projectile rate at stage 1 with no cast speed is .625 per second.

The first stage does not gain projectile frequency. Therefore 10 stages gives (9 X 15) = 135% increased projectile frequency. The plus 2 maximum stages helmet enchantment adds 30% projectile frequency.

All cast speed modifiers are additive with the increased projectile frequency. Therefore a 10 stage winter orb with 100% cast speed has (135 + 100) = 235% total increase projectile frequency.

100% more projectile frequency will double your projectile fire rate while channeling.

Example: 10 stages, 100% cast speed. Currently being channeled.

- (.625 x 3.35) = 2.1 (2.1 x 2) = 4.2 per second.