Demonic Servitude: The Giant Demon is Your Friend!

I can't quite remember when the Felguard was introduced. Demonology Warlocks, being masters of summoning demons, have, for a long time, had an extra minion. The Felguard is basically you're go-to all-star, who you'll basically always be using unless you need to keep your pet at range (in which case you'll use your Imp) or you need another form of crowd-control (Succubus.)

So I was hanging out with my buddy Zurilshoken through Wrath and Cataclysm, but then when Mists came out, the Grimoire Talent tier called out to me. Grimoire of Supremacy turned all your demons into more powerful demons that used BC models instead of vanilla ones. Thus, I was introduced to my Wrathguard buddy Kil-Barash. Kil-Barash has been great, dual-wielding Hellreavers and helping me deal with my new Demonic Fury (the key to managing your anger as a Demo Warlock is to turn into a giant demon and kill things.)

Well, damn if now there isn't something else to compete with Kil-Barash. And that is the new level 100 talent: Demonic Servitude.

What this allows you to do is to summon your Doomguard/Terrorguard or your Infernal/Abyssal as a permanent pet. It shows up on the character-select screen and everything. It's... pretty damn awesome. Plus, if you've gotten yourself the Codex of Xerrath (Green Fire,) the Abyssal will be Fel-green (whereas I think Infernals are by default.)

I'm sure this is still undergoing heavy iteration, but right now it looks like the Infernal/Abyssal is going to be your go-to minion for soloing, trash, and any AoE situations. They have a threat-presence to tank for your and reduce melee damage they take, plus they can interrupt and dispel buffs on multiple enemies.

Right now, the Doomguard/Terrorguard seems to have fewer abilities, which could be filled out later on. I suspect that this one will be better for single-target situations.

So what's the trade-off?

Well, obviously having this talent means you won't get the big, powerful 10-minute cool downs in addition to your active minion. As far as I know, the various Warlock pets are tuned pretty close to each other, so they can probably fix it so that having the super-demons out permanently is better than having a normal demon in addition to the cool down version of the super demons.

However, ironically, the one place where this could be problematic is Demonology, where you've already got a boosted demon in the form of the Felguard/Wrathguard.

I'm sure there will be some theory crafting that comes down the line, and the difference might wind up being only one percent or something. The point is, if you ever felt jealous of that Undead Warlock in the original WoW cinematic who was sending Infernals after his enemies, well, this talent is for you.