While yes, it's true that the more dinosaur creatures you have in your deck, the more likely a card you reveal with Gishath's ability will be a dinosaur creature, but that doesn't mean you should be playing bad cards on the hopes that Gishath might put it into play for free
One black: You can sacrifice a creature to make all players sacrifice Two generic, one red: You sacrifice an artifact to make all players sacrifice an artifact
Second Ability: Hunt for Heresy - 1, Tap target creature an opponent controls
Adding Mockingbird would increase your chances of having multiple copies of Sazhs Chocobo early, which gives you your best shot of putting your opponent under immense pressure
Sapphire being able to accelerate the amount of Ink in their Inkwell could see Tamatoa come out turn 4 or 5
Dont let his status as the second fiddle fool you, this half scarecrow, half birds nest was a serious threat