I would probably say something like:
Passive- Soulforger : When Vulcan kills a minion, this is added to his own currency. When he uses his ultimate, he spawns extra minions that stay in his colossus. His minions are released upon the colossus being attacked.
He can only have a max of 100 minion currency. Each 20 currency = 1 minion.
Minion: Vulcan Automata- automata of Vulcan that have flame cannons as forged by the god himself or his devoted smiths. These are used to help push a lane, or provide an annoyance.
Hammers- Vulcan uses basic attack steroid to throw hammers. When they come in contact with a minion or God they explode.
Ornithopters "My finest creation"- Vulcan directly summons a "bomber" that conducts a bombing run on a lane in front of him (the bombers are dumb and only go forward but they do wave clear). Archer minions will aggro this specifically. If an enemy god is marked at the time, Vulcan will also summon two Clockwork Drones that will buzz toward the enemy god(s) and start shooting at the god(s).
Meatball- Vulcan's meatball still.
Colossus (as in OP)
Y/N?