Alexei Stukov by Demolij

[Level 1]
- Fungal Production:

Stukov is a unique support in that he's very close to being a straight up assassin. His initial damage numbers are rather weak but when he really starts dealing damage is when he repeatedly pokes at them with basic attacks, and after stacking on them a couple times they will start burning down much faster. This is great because he heals better the more damage he deals but it also limits his value against tons of burst. He fits in with comps that like to avoid directly fighting so he can keep reapplying Corrosive Blast without fighting right away.

Transfusion is your biggest healing tool, because Stukov has lots of self healing that can be utilized to heal allies. This gets more value with double support but with just Stukov it still gives allies some strategic position options. Most of Stukov's healing is single-target and he can't swap around like Morales but the healing is also essentially free. Meanwhile Biomass Extraction seems like it would be counter-intuitive, but Stukov likes to position aggressively in order to stack Corrosion so picking up Biomass can be viable. It also can simply provide Stukov with some much-needed self-sustain but be careful of enemies trying to counter-position you. Fungal Growth mostly provides damage but the slow can be very heavy on enemies you've stacked on.

Virophage Infection is similar to Doom from WC3; attach it to a dying enemy and you'll get a pet enemy to toy around with. The damage itself isn't incredible though if it's buffed by Corrosion it can be, but the real benefit is turning a single takedown into a 6v4. Pick your targets, an infested warrior is deadly as can be a ranged assassin, but a support can be easier to pick off. The ability may not be quite as useful in the high tiers where a single death spells victory, but it does have a lot of value for any sort of picks and can even be used for pushing. Parasitic Bomb is functionally the exact opposite, it deals damage to everything except the enemy it hits but heals you in the process. The damage it deals is pretty strong though the issue with AoE damage is that it's hard to apply stacks to many targets at once. Neither heroic is a true support heroic but I'd say this one is the more support-y.
Assassin build:

I wasn't going to make a design for this guy at first. I thought "everyone else is already making designs for him, I'll just be another dude with a Stukov design", and "Blizzard is probably already making him internally, so why waste my time." I saw the light however. I'm sorry for betraying the Zerg. Stukov is pretty swell, and he wasn't even that difficult to design!