Replacing Venomancer with a poison zombie was how I came up with this project image - The Crossover Cards Mod for Artifact: The Dota Card Game
A mod that aims to replace almost all the cards in Artifact with characters and items from every other Valve game! When Artifact was first announced by Valve, people were theorizing that it could become a crossover game for Valve characters, like Super Smash Bros. Obviously it didn't so I set out to make a reality!
I was playing Artifact one day, thinking about those theories that it would become a crossover, and I though "I mean, it's all pictures and text files, right?" (They weren't) "Why couldn't I try replacing the existing cards and turn it into a crossover?" And then I immediately started writing down ideas, starting with the poison zombie from Half-Life 2 replacing Venomancer.
It just makes sense! Like how Venomancer summons plague wards every round, the poison zombie from Half-Life 2 is known for throwing out multiple headcrabs during combat. And plus, the plague wards even shoot acid, just like the poison headcrabs!