Initiate of Blood to Goka the Unjust: You will either have to hit a 1/1 or hit it with something else to make sure the opposing creature dies
What is different from Zhuge Kong is that it has an activation effect, and the advantage here is that it can be activated at any time
Two mana for a weak Impulse that puts excess cards in the graveyard is perfectly playable, and flashback gives us value in the late game if we mill this through other means
If you get three different kinds of energy using Phoenix and then attach a fourth energy for the turn, you are already hitting for 100 damage, which is pretty solid for an attacker that appears out of nowhere and sets up in one turn
Even better, Vial Smasher has partner, meaning you can bring in another creature to your deck, giving you access to more colors to play a wider variety of Goblin creatures and more impactful spells
At the beginning of each end step, if a card left your graveyard this turn, Gau deals damage equal to its power to each opponent