Hey, I'm really really late replying to this but I didn't do Priestess of the Moon.
I don't know if I'm just being self-glorifying but going through this but I just had some people ask me to post more so I figure I can try to explain my hero involvement more precisely.
For some reason this forum is being very angry with me and doing "post denied" whenever I try to copy what I wrote over. It seems to accept it when I break in two however.
Of my design. I'm really happy he's turned out to be so popular; I had high hopes for pathing blocks on Fissure and it seems to have become a success. Not much else to say, except that I had no idea his slow cast animations would have such an effect on his playstyle. It was just around that time that we were learning to synch up animations with actual effects, and wanted to make good use of the Tauren totem slam.
This guy is sort of mine. Tiny was in the game before I came around and was considered an old favorite but had been removed since he just wasn't working. Iirc his original had Grow as well, so we just built on this theme on reintroduction.
I had some input on this guy, or at least his "invis next to trees" ability. Leech Seed and his global aura weren't in the game at the time I worked on him.
Of my design. His original version didn't have Battle Hunger speeding Axe up, nor Culling Blade boosting ally movement. Probably good advancements since his original form had practically no pursuit power.
This was another guy's idea that was put in under my watch, where I had some input on the refinement of the idea but it was somebody else's baby.
Like Tiny, Doom Bringer was already in the game when I came around. I was just involved in giving him a facelift from his old version which was only a moderately changed Pit Lord from WarCraft 3 (although the new mechanic with him acquiring neutral abilities on Devour isn't mine, but is very cool).
My pride and joy. What some of you might not know is that the current Pudge is actually the second Butcher that was put into the game. His first incarnation was as a summoner/pusher. He had the ability to store corpses like a Meat Wagon and then raise them. However, his ultimate was probably the most broken spell ever in DotA: Carrion Flies. The flies were a small, weak summon that were able to raise more of themselves. This would unfortunately result in Pudge being able to push an entire lane...while sitting in his base because the flies would increase in number faster than they'd die out. They were doubly horrible because they had no collision size so you'd see one fly....then die because it was actually 50 of them stacked on top of each other. Yeah, he got outright banned by people in public games.
It's been interesting to see how since his inception he's sort of permeated back into Blizzard's design. If you play World of WarCraft you'll notice that many of the abominations now have hooking moves and in Diablo 3 their Butcher also has a similar move.
Of my design. His entire design came just from the fact that I found out that the scorpion models had a burrow animation and I really wanted to use it. He's probably one of my heroes that has gone through more changes than most, simply because he was such a boom-or-bust hero that was hard to balance. The original Epicenter stayed where it was cast, rather than following the Sandking. Slight adjustments in casting and stun times between Burrowstrike and Epicenter either made him way too powerful or completely incapable of getting his combo off.
Of my design. First hero I ever got into DotA, while Guinsoo was still project head. He's also undergone quite a few changes like Sandking. His signature ability to convert Strength and Agility was there, as was Waveform, but that's about it. His ultimate is now Rubrick's (although my version was far more unwieldy to use) and I don't even recall what he had in place of Adaptive Strike.
Already in game, I just invented her Song ultimate to replace whatever was there before (I don't even remember what it was).
Of my design. Another case like Tiny where the hero was in before I came but was removed. I just brought it "back" using the original as an inspiration.
Another case like Doom Bringer where the hero was in the game but I was involved in a heavy revamp. He already had perma-invis, but his old ultimate was Death Ward (same as the Witch Doctor except non-channeling). We nixed for the same reason Sandking had balance issues, where the hero's whole power depended on a single combo murdering the opponent before they could react. Smoke Screen and Backstab are my particular additions.
Of my design. Fuzzy Wuzzy was the first hero to have a "secret" name. Fun fact is that his original version is that he was technically a ranged hero. Fury Swipes is based off of the Firelord's ability and the ability just wouldn't work when you put it on a melee hero. So he was actually a "ranged" hero in disguise to make it work.
Of my design. One of my personal favorites just because I like arthropods.
Of my design. In a twist of irony, I gave him a "useless" ability that ended up being removed and would probably have now been considered overpowered. I had the whole idea in my head of Shukuchi/Geminate/Time Lapse, but I couldn't think of a 4th ability that fit. After a while I basically gave up and awarded him the ability to summon invisible Shades which he could position around the map, giving him good vision of different areas. Yep, he had free everlasting mobile wards. Of course back then wards weren't in vogue (in fact, it was around my time that consumables were even introduced) so this ability was considered trash and skipped. I don't know when it was changed to the new swarm ability.
Of my design. Ultimate has since been changed. His original ultimate was a set of orbs which floated around him that he could expand and contract, like a permanent version of the Guardian Wisp ability. I am however glad to see that Shadowraze has stayed around; it was an experimental ability that I knew was hard to control when I put it in, so glad to see that better players than I have made good use of it.
Of my design. Ultimate was originally Untouchable and Impetus was a basic ability, but other than that she still had the same set of abilities. Her healing ability is actually a variant of the War3 Crypt Lord swarm with a bunch of little units having auto-cast heal turned on. Recently picked up Dota 2 and she's probably one of my favorites to play as a support who can also sting when needed.
Keeper of the Light:
I was involved in him, but I don't remember much else except working on Illuminate at some point. His original ultimate was an ungodly annoying pushing tool, a sort of Porta-Furion that could teleport around the map and summon support wisps to help fight.
Already in the game, I just added in Static Field since he became rapidly useless past the early-mid game without the ability to weaken stronger opponents.
Of my design. Fun fact is that Heat Seeking Missiles is Fan of Knives with a HUGE radius and small target limit. His ultimate actually stems from a limitation in the WarCraft 3 engine. There is no way to reset individual abilities in triggers, so you either reset everything or not. Otherwise he might have ended up quite differently.
Of my design.
I was involved in him. Like the Bristleback he was somebody else's baby, but I did the coding and refinement from the initial ideas.
Already in the game, but I put in Witchcraft so that like Zeus her damage potential wouldn't just tank in the mid game against stronger heroes.
Somebody else's idea, which I refined and coded. Blackhole, however, is my invention.
Of my design. As a somewhat embarrassing anecdote, I was unaware of certain definitions when designing him. His original name was "Necrophiliac" since I figured he was affiliated with the dead. It was only brought to my attention later that I should probably rename him.
My version has since been overwritten. He was in the game previously and the gargoyles had always been his ultimate. I introduced Grave Chill as well as some other abilities to him. Soul Assumption is not of my design, nor is the new Gravekeeper's Cloak.
Originally my idea. If the website lets me link URLs, I have a funny old picture of the original version equipped with a Dagon killing somebody (since it didn't have the limitations of the current couriers).
I didn't do a lot with item invention, mostly I just sorted them. I did however introduce the Bracer and Wraith Band (originally Null Talisman was the only early game tri-stat) as well as the Refresher Orb (since it was basically the same idea as the Tinker).
And whew, I think that covers most of what I was involved in.