a totally random idea: a new zerg unit that spawns 2 smaller copies of itself when killed, each having half the hp and attack. when each of 1st gen spawns die, 2 even smaller 2nd gen spawns emerge, having 1/4 hp and attack of the original. e.g. zerg spawnlisk (lol wtf...) 80 hp, 8 damage spawns 2 zerg spawnee upon death zerg spawnee 40hp, 4 damage spawns 2 zerg spawnling upon death zerg spawnling 20hp, 2 damage OR just make some original zerg ground units spawn some broodlings upon death
Like the Hydras from W3 ? I believe in Beta or Alpha Starcraft when Guardians died, Scourges would pop up (named avenger) to take out enemy aircraft. That was kinda cool i thought, but it's also reasonable to have scourges built from larvae as well