You can imbue a ability, which can't be imbued

[lycanththnacyl]

For example you can imbue Infernus's Afterburn by Improved Reach

 

[Beattie]

that's odd, it shouldn't let you do that

 

[lycanththnacyl]

that's odd, it shouldn't let you do that

i forgot to add, you can select unimbueable ability by pressing 1-4 (3 in that case) on keyboard