As for your Trainer Cards, Giovanni is useful to this deck as the 10 additional damage he provides during a turn can be the difference between attacking an opponents Pokemon and knocking it out
You have access to toxic right out of the command zone, its a 2-mana commander, and you can start infecting people early in the game
but when I trace at my pleasure the windings to and fro of the heavenly bodies I no longer touch the earth with my feet: I stand in the presence of Zeus himself and take my fill of ambrosia
Return those cards to the battlefield under their owner's control at the beginning of your next upkeep
Moreover, you have to pay attention to the risks of non-inkable cards - bottom some of them if your opening hand has more than two, and avoid aggressive mulligans if your deck runs too many (say, more than 25 percent) non-inkable cards
Some people even think it might be the ancestor of all other Pokmon