20% chance to reset spell cooldown

[Kolya]

Blood Types Guide - Scholar. lvl 4 - 20% chance to reset spell cooldown on cast. I've used Chaos Volley 15 times, but it never recharged instantly.

[Grimm Turd]

It may be a bug with a certain spell but it still works. You'll see the "Free Cast!" pop up immediately after casting a spell. In the case of spells with multiple charges per cooldown, like Frost Bats or Sanguine Coil, you'll only get one extra charge per "Free Cast!" indicated.