Needs idea for story and some heroes

my problem, is that im doing a single player campaign, i made some skins for some neutral units. but i need, as the title says, a idea for 3 more heroes, post anything, and dont forget me to tell how it should look like, and the history is less important, i need original hero ideas
i already have two, i need three more, but tell me if my heroes r good n such
(based off dk skin)agony knight, its abilities are concentred in melee, he's targeted as a air unit, and hostile units will have a 2nd attack to attack him, it will be ranged, the knight have one ranged attack, it throws a mssle and stuns a lot of persons in a area..it's like the Ahlen in enfo's.

the second unit is based off sea revenent, i will try to add a glow later, when im sure about him. he cannot "move" he have a blink ability, req lvl is 1 , and the rest is 2, so he gotta start with this ability. he can move with blink, at first it costs a lot of mana, gay cooldown, and poor range, at later levels it can teleport really far ( up to 1300-2000 ), it also have a non-hero ability, where the "patrol" button should be, it teleports him to a nearby hero. this could be the main caster, since it sacrifices its movement, and it will maybe sacrifice its attack, to add a Orb of annhil-based skill ( if it works ). this guy could be really strong n such, but some players will leave if they see that their own hero got no attack or move buttons, only weird spells.

3rd , 4th and 5th is up to you. or other ppl. haha.

I'm sure some have good ideas.

What would happen if the person didnt choose blink as his first ability? And I can't give you any ideas because I am making a map and still need to think of some heros. But one of my heros will be young and have a ability to transform into an older self, maybe you can do something like that.

thanks for the idea, i will consider it, about the blink based skill, at lvl.1 he can't choose something else, i will make all his other skills require the Blink based spell, once he will have a point on it, the other spells will be unlocked.

I really need more suggestions, every suggestions are freely welcomed