It turned out that in order to cast any spell with Talen of the telepath after I choose it, I need to click the mana symbol and only then its possible to cast it. I don't know what if I will have no mana free.
Hello,
I have encountered a problem during a game #822724650 after a cast of the Talent of the Telepath the 7 cards were placed in temporary zone - I was able to chose one of them but after that card stayed there - it stayed greyed out and I was unable to cast it.