The 2% hit looks very nice, especially for classes like warlock.
![Image](https://i.imgur.com/Pk7VRcK.png)
But the last negative bonus is the main probpem - with a highest chance your casting time becomes +10% longer for a whooping 15 seconds.
I did few tests and this negative effect is almost always persists during spells spam.
What the point and why should some1 use this trinket ?