You need to clear the challenge "Leaders Advantage".
Ty. I havent seen it anywhere.
I'll keep looking
It's a 5 star challenge, the ones with the golden background. Once you complete that the menu for leader/tamer skills will be unlocked.
Spent another forty tokens and found it lol. Ty!!
No problem, i can understand your confusion since the game never really tells you any of this important information, only AFTER you unlock the damn thing.