While discussing Warlocks and the new Uneartherd Arcana at GiTP forums, we were kicking around the idea of a class only feat (versus the Xanather's race based feats) and I arrived at the following homebrew *Arcane Adept* feat. 

### Purpose - support the Warlock design goal of customizability.

I quite frankly find that as I go through the invocation allocation from levels 1-20 that there are too few to support the "no two Warlocks are alike" design theme that choosing invocations offers. Yes, it is important to have to make choices. 

What I want to know is if this proposed feat is balanced with respect to PHB feats. (Balance with Xanathar's feats is not of any interest to me). 

**Secondary Objective**: offer one more incentive to play a full-up Warlock, and not "take a dip" in the class for Multiclassing. 

> 
> **Feat**: **Arcane Adept**  
> 
> *Prerequisite: Warlock level 4*  
> 
>  1. Increase your Charisma score by 1, to a maximum of 20.  
> 
>  2. Gain one invocation of choice from those available to the Warlock and for which you qualify. {eg, Pact of the Blade can't take invocations restricted to Pact of the Chain with this feat}  
> 
>  3. Gain one additional cantrip from the Warlock spell list. 
> 
> 
> 

Notes: 

1. Why level 4? That's the first time one is eligible, and it prevents
the vHuman feat-at-level 1 (which also would not make sense since
pact boon is a level 3 featue anyway).
2. Why add a Cantrip? Because only two features in the feat seemed
underpowered. If that is what tips the balance scales, it can be pulled.

**Is this balanced vis-a-vis PHB feats?**  

Repeated for emphasis: feats in any UA, in the recently published Eberron campaign setting, and in Xanathar's Guide to Everything are not considered relevant for this question. (But if after answering the question you want to add a comment, as a coda, in re a Xanathar's feat, then that's fine). 

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### Unhidden Agenda: make a case to my brother, the DM

I will be trying to convince my brother to allow this feat if I can make a sound case that it is balanced - in either January or February - when my cleric retires and my recently created warlock is introduced. If it, as currently presented, is not balanced, then any observations on "what would make this balanced would be {x}" are very welcome.  

**Note:**  

I got a suggestion in chat to name it "Eldritch Adept" rather than "Arcane Adept" so a comment on that is welcome.