Why !!!

Hello
How can i put new talent to any monster ?
I saw two ppl could use that
One could use fenrir inva
Second person could use gry rain weather
But how ?

[Koenaj]

Those are old Talents. The first time Fenrir and Gryphion came out, those Talents were available on them, but they got removed later on. Haypi didn't chance the existing monsters with those Talents.

But i want change my monsters talents
Why they can do like this edit to monsters ?