Rohana by Demolij

A unique hero, similar to Medivh, Rohana is a low-healing support that can have a high impact if worked with well. Her damage output is pathetic and her durability is miniscule, but if defended she can provide a heavy amount of utility for her team. She works best as a secondary support, or on teams with decent durability she can potentially work as a solo support. Her Trait Khala Link gives her some passive healing without lifting a finger by causing allies to heal for half a Globe anywhere on the map, making her automatically optimal for large maps or those with lots of Globes. The healing has no effect at all on stacking Globe quests but when all heroes are laning the innate sustain is very useful. The second aspect of the Trait gives a bit more direct healing, letting aggressive players heal for a bit of health by dealing some damage, which may put you in some danger if you're not careful and is pretty useless out of combat. Together though, you can put out some decent healing all things considered.

Guardian Shield is a strong defensive ability that can greatly reduce enemy poke damage, but given sustained fire will eventually wear out. The range is wide enough that you can protect your backline of squishies, but won't do much good for allied divers and doesn't really have the potency to defend against a ton of damage. Cosmic Binding is a cc skill that does absolutely nothing for a while against enemies who are standing still, however if they try and get away from the cast point they take a chunk of damage and are stunned for a pretty lengthy duration. It's a great anti-mobility tool, but if you can't hurt them while they stand in the area then it won't have much of an impact, especially when it deals no damage.

Recall is obviously an amazing ability with potential uses far and wide. It's good for ganks and getting a hero back on the map really quick, or whatever other uses it could have. The ally needs to stay still though, meaning if they're getting ganked they have to stay in the little bitty circle instead of running, and the enemy could knock them out of it, so there is certainly counterplay. It also takes longer when the ally is further away, so it's not a total replacement for mounting since sometimes it's worth it for the ally to just walk there.

Peace is a funny skill, with similar uses to Sanctification in some ways. It can completely shut down wombo combos and keep an ally alive across the map, but it does not stop cc or non-heroic damage, so it's not foolproof. Be careful or you might find yourself saving the enemy team from a Precision Strike and wiping your own team afterwards. Used sparingly it can be one of the strongest heroics in the game. Psi Tether is a more localized way of disrupting the enemy. It has a great deal of versatility, allowing you to place it on a tank and a squishy so burning down the high-health one will kill the other, or by placing it on two key targets to disable them both at once. I can imagine it being cool to Void Prison a linked target and them both being stopped. Similarly to Peace, however, if you use it poorly your team might be unable to actually kill their focus target, but even then the cc spread is pretty cool.