*plays Pokemon themesong*
Seriously though, his summon powers are pretty much what every minion master wants in every game but never seems to be able to get. Ive played a lot of games but even those where you can do this, such as Path of Exile, don't quite work out. The support for minion users is usually just not there.
People generally suck as balancing it too. Thinking its "lazy" or some shit and putting extra rules on it that it never needed to be balanced. Making it not use the core stats is also a common mistake. You end up just ignoring what most other players would covet because you only need specific stats for your character. Almost always to keep yourself alive and increase the minions power because they suck for some reason.