Mercy by Nima Nightmare

i think mass res can be too annoying, and overall she has no aggressive abilities except her aa, which is a bit boring IMO (well like in OW). also CADUCEUS STAFF have the same problem of morales's old healing beam- if you are full of mana no one dies, but you get oom fast and need to constantly hearth. so maybe it should have a limit (cd...).
i have an idea for one thing to change- increase basiic res charge rate when she aa heroes, and reduce res recharge rate from healing(and the related talents). it will make it harder to recharge res, which is a really strong ability on basic.
also a tip for images- use "img width=#" (instead of just img) where # is a number (48-64 are good) in order to set their size. it will look like this:
so we can see well all your nice images.

Both Resurrect and Mass Rez are incredibly overpowered (Auriel). That combined with incredibly potent healing (10 mana for 260 health per sec is ISNANE! compare that to Uthers 80 mana for a 360 heal (and that one also has a cooldown of 12 sec)) AND mobility make Mercy's kit incredibly overloaded and in my opinion probably the stronger than any other hero in HotS.

My fix ideas:
Make both Resurrect and Mas Rez temporary! killing the ally returned with Resurrect after 4 seconds will leave this ability very strong (think of how much damage an assassin can output in 4 seconds), keep its flavor and make it very interesting to play with and against - think of enemies guarding dead assassins spirits so that they cant be resurrected, it also makes dying a lot less boring since you can be returned at any time to burst down nearby enemies (I also disagree with making a non-ultimate ability have a charge, but thats besides the point), maybe also increase its mana cost to something that will make you think hard about using it (80-120 mana), same goes for Guardian Angel.
Mas Rez could resurrect your team for a much longer duration maybe even up to 10 seconds, that will let your team push objectives - giving them another chance to win a teamfight.

Secondly, for the staff - damage boosting by 20% constantly is kinda scary but I guess its not TOO scary, as a fix for her healing being insanely strong I would half its healing and double its mana cost making it 130 hp for 20 mana per sec.

And lastly, the stats themselves - all heroes with mana have a 500 Mana starting mana pool, I see no reason for Mercy to be different, also, her health regen is much higher than other characters (heal regen is set by starting health - look at other heroes as an example), other than that the max health seems good but just a little FYI... she does more DPS than Butcher with 4 attacks of 50 damage per second... thats kinda insane, much higher than any other hero.

This is more than I have ever written on an essay probably, not sure why I did write it but it was fun.

I really do want a Mercy like hero in Heroes of the Storm, a mobile hero who can easily escape danger, I see that you went for a hybrid of damage or healing. But with this you can go as a secondary healer and then in teamfights you wreak havoc in the backline while still ressing anyone who needs it. She possesses a very powerful kit, and in this case, a way to power kit.

Her heal seems quite op, it’s double the healing of an Lt. Morales beam per second and for pretty no cost. (Mana regen 4.4 per sec and cost is 2 mana per sec.)

Causing the Damage boost to grant a flat 120 damage could surely make some heroes like Abathur a powerful auto attack hero. Maybe a % increase instead of flat Attack Damage would be better. (Also imagine Sgt. Hammer, what a nightmare)

Depending on the range of Guardian Angel I am a bit concerned if this is op, decent or overpowered. Especially with a combination of Flight Test and Guardian’s Observation. Because 25 Mana is not much at all. Especially for a 5 second escape/relocate.

Resurrect is almost like the Auriel ress, just available pre 10, it doesn’t sacrifice another ultimate. Although the window where you’re able to interrupt her is larger than with Auriel, but a basic ability with a 80% max hp ress is quite op. She can also quite effectively gain her ress back quickly. 5% per second healing, 20 seconds of healing a damaged ally will grant her a ress.

At level 10, Valkyrie grants Mercy 414 DPS for 7 seconds, meaning that if she faces off in a 1v1 vs an enemy with no cc, she can deal around 2.9k damage in 7 seconds. Compared to Valla if she were to pick. (Maybe reduce her damage potential and increase the Guardian Angel speed.)

Mass Rez is a good idea, but it’s just not really that optimal, it would surely bring up the same problem as she had in Overwatch before the ult was reworked into Valkyrie. Mercy waiting far away to then swoop in an ress all allies with 0 counter play except killing Mercy first. (Lower health% when ressed and a short invulnerability/armor bonus for all allied heroes ressed?)

Onto talents,

Tier 1 (Level 1)

Angelic charge, 5% to 10%. If you heal an ally for 10 seconds, you gain a resurrect charge. Meaning that even in the lvl 1 skirmishes and other early fights, she would be ressing people all the time.

Improved Biology, it seems pretty balanced tbh. Maybe a bit underpowered but idk.

Angel of Leech, it’s quite a cheap quest, 1k isn’t really much when Caduceus Staff buffs allies by a flat 120 damage. meaning that 9 auto attacks on heroes without armor would be enough to finish the quest. From any hero that can auto attack.

Tier 2 (Level 4)

Flight test, after spamming a 5 second cooldown spell 30 times make it have barely no cooldown and cost no mana. This will make her uncatchable.

Speedy Recovery, This works nicely with Angelic Descent, but I don’t know if it’s really nice to have an ally have 20% extra movespeed from lvl 4 as long as you keep your beam on them.

Angelic chill, Mercy’s attack range is quite low and she is a squishy healer if she had to go in to basic attack to apply the slow it would be quite dangerous in case the enemy can lock her down.

Transcendencey, 1k HP over 3 seconds after being revived with already 80% hp is a lot of healing.

Tier 3 (Level 7)

Guardian’s Observation, I’m getting a brightwing feeling, but her Phase Shift has a long cooldown, this can be a free 30% shield of an ally’s max hp every 1.5 seconds on both you and them.

Untouchable, This grants her the possibility to 1v1 any auto attack based hero. Zul’jin, Dead! Valla, Gutted!

Hand-Improving Staff, 1+ attack speed can be a lot on some heroes. Especially if you add 120 dmg on top of that. That alone is 120 dps alone.

Witch staff, being able to reduce an ally’s cooldowns by 5 every 2 seconds or so? is really op. Any mage/healer/any hero would love this. A bit to much. Which would make Mercy’s main focus as a healer to almost disappear a little and cause her to maybe only swap on and off the beam to make their abilities cooldown faster.

Tier 5 (Level 13)

Angelic Pulse, 3k healing to each nearby ally over 10 seconds. (12k in total to all allied heroes) That’s without the 300 health over 3 seconds and without scaling accounted for. 50 seconds cd and practically no mana cost either which would make this op.

If you picked Valkyrie with this, I see 2 possibilities. A level 13 talent being useless during the ult and kinda hurting mercy (2x mana cost) or an ally receiving double healing from her beam because of 2 bounces.

Right beside you, and now it’s time to say gg. Can soak any lane super easily, can roam, can go anywhere on the map where an ally is within seconds. + with Flight test this is insane. Imagine that your team just fought at their core, 10% hp left and they’re all dead on both teams. Time for mercy to fly in at a global range and just destroy the core.

Angelic Step, move for 20 seconds, gain a free ress.

Tier 6 (Level 16)

Super resurrect, okay so now there’s no counterplay to the ress. Because she can’t be stopped. and it’s charge always increased.

Angelic Presence, if this is if you still haven’t taken any dmg then it’s fine, but if they have to not have taken in a while, then it’s kinda worthless.

Always watching over you, heal from far away and also dash to them if an enemy dives you. But if you break the link they still get healed. A bit op.

Battle Angel, I’ts a bird! It’s a plane! No it’s a battle mercy coming in that can 1v1 anyone.

Tier 7 (Level 20)

Onwards to victory!, Now she can’t be stopped either and basic attacks now chain. The 20% movement speed bonus is already in a previous talent as well and movement speed doesn’t stack.

Heroes never die!, well now they certainly never die, 5 seconds of invulnerability and 50 health regen and 200 movespeed for 5 seconds. + you instantly gain a resurrect charge. Now this is the max level of op we can get I believe.

Angelic Biology, this talent just completely takes away the need to pick Improved Biology. It’s pretty much the same effect, just better.

Advanced medical attention, Okay soooo.. invulnerability? Forever for 10 mana per second? Ouch..