Had an idea earlier to make a Warlock class based around Mumm-Ra and his transformation from Thundercats (But not that ********* Thundercats Roar which really is a **** show). Not thought of a good name for it yet so just going with Warlock Varient right now
Now obviously making a Mumm-Ra character can easily become OP but I've tried my best to make it fair and balanced.
First of all, I'm going to use the Rage ability from Barbarian as a focus, taking several things from there and adapting them.
Spell Slots: lv1 - 2, lv2-10 - 3, lv11-16 - 4, lv17-20 - 5
Cantips: lv1-3 - 4, lv4-9 - 5, lv10-20 - 6
It takes a Bonus Action to Transform into your, well lets just call it a battle form.
It lasts for one minute or until you stop it or are knocked unconcious.
At lv1 you can only Transform twice before needing a long rest to use it again.
When transformed, you gain a +1 to Dex and Cha, and roll a D6 to gain temp HP, all of which are removed when you turn back to normal.
Now obviously these are the benifits of the Class, but now for the downside/disadvantage.
You can only play as an extremely old character or a physically crippled character, and your speed is 15 feet.
You can only cast Cantrips in your normal form
Transformation is a verbal command, so if you're unable to talk for whatever reason (Gagged, had Silence cast on you etc) you can't Transform
Much like He-Man, She-Ra and Mumm-Ra, you need to say a line to Transform, it can be as simple as "By [Your Patrons Name Here], I Am Transformed!" to something like "By the light of The Celestial! I Am Empowered!". Have fun with it but kee it to a few lines.
If you're knocked unconcious you Transform back to normal.
and much like how Mumm-Ra couldn't stand the sight of his own reflection, you have to take a weakness to a certain type of damage while ransformed: Bludge, Pierce, fire, Ice etc
Obviusly this is just based around lv1, and I've not thought what you can gain at lv6 and so on. Plus as you level up you'll also be able to Transform more often (like how you can use Rage more before resting)
What you think? Bit too OP? Balanced? Not enough?
This is just my initial idea and need to workshop it plenty if I'm even gonna convince DM to let me use it in a proper game.