Watched some Ender Lilies gameplay and felt inspired to try and run a 5e game somewhat similar in theme and style. I'll keep it short, but basically here's the idea I have thus far:

Your characters are spirits of warriors, mages, cunning tricksters, or really any other person of great potential who has died in a blighted Kingdom for one reason or another. Effectively while you create your character by standard race/class rules, you'll be using a custom background reflecting your current fate. This leads to the next part.

Your characters are bound to a single character controlled by me. This character channels your powers, due to a sever lack of power on their own part, effectively turning them into a sort of gestalt of not just two classes, but of each class from each player. In practice, when it comes to combat initiate will be done as normal however when it is your turn, you get to move my character and preform your actions as normal, and when your turn is up you lose your control and it's someone else's turn. This has potential drawback and limitations, for example if two spell casters are both casting concentration spells, as long as they each are casting different spells it's possible for them to technically have my character affected by both spells. However if my character is struck by an attack, [i]both[/i] casters need to roll a concentration check to maintain their spells as well. Additionally should this character die for one reason or another, that effectively kills off [i]all[/i] the spirits at once, so it's imperative you protect them if you want to continue your existence.

There may be a future possibility for your characters to obtain a physical form so you can fight and act independently of my character, enabling more tactical combat as well as keeping the character safe. To do this however requires something important from you as a character: I'd need you to send me information about an area where your character had died, and more or less help me set up the scene to explain your death and how going to this area could spiritually strengthen your character to Manifest a physical form. This helps in two ways: helps me get a better sense of your character, and helps keep you as a player invested in the story. Because that brings me to my next point.

There's a possibility that a player may leave for one reason or another. Maybe they don't like the game, perhaps life simply couldn't find the time. I can understand why, and to ensure that the game proceeds smoothly despite the lost I've already thought of an IC reason of what happens. See, being a spirit is hard enough knowing that you've likely died a traumatic and painful death. Most people lose their minds and become the very monsters we'll no doubt he fighting. But some simply lose their purpose and vanish from existence without nary a whimper. It's a bleak existence out here, and it's all the more reason it's important to be able to find the will to keep fighting, somehow. That being said this also serves another purpose: should my character feel threaten or believe that your character is working against them, they can simply relinquish their bond with your spirit, which will also result in your demise as without an anchor to this world, you spirit simply becomes another mindless enemy. Keep that in mind if you're intending to create a character who doesn't care to cooperate with the team is more than willing to put their host in danger.

Anyways that's enough gabbing from me. If this sounds like a good idea go ahead and put your thoughts below. I'm likely only going to take six at most, so it'll largely be a first come first serve thing, but I'm willing to take more if others drop out. Additionally if you have any other questions or concerns feel free to ask them and I'll think about an answer. I'll admit I haven't gotten everything thought up so it'll be good for us to discuss it so we can work out the details.