Greasefang, Okiba Boss cares about having vehicles in your graveyard, which makes me think of a porte-manteau of motor pool and cesspool. I like the theming here: You cast your vehicles, they exist on the battlefield, they die in combat, Greasefang brings them back, they can come back to your hand if they survive
You pay at the resolution of the triggered ability this matters only because the trigger can be Stifled, and if the card is no longer in your hand somehow (if the opponent has some instant-speed discard effect), you wont be able to cast it when the ability resolves
Itll be truly ghastly if youve got some face-down synergies or ways to flip them face-up on the cheap
Feline Ferocity
If it was more in the five mana range and appropriately scaled down I could see the draw but as a 9 mana card a big no thankyou ma'am
This trend of being less useful continues as you go up the curve with cards that produce either Eldrazi Scions or Spawn