Meh, bear doesn't strike me as good enough to hate draft, and I'm against hate drafting in general so... I'll go for Sanctuary Cat. Could be okay sideboard tech for aggressive decks with a lot of X/1's.
Alright then, I'll side with the Fengraf faction. A land that turns itself into a random creature is still virtually card advantage, and we are light enough on color requirements so far, so we can throw it in for that tiny advantage.
Grafdigger's Cage could be a nice sideboard option against undying and flashback should those proof too problematic. We already have one Midnight Guard which may not make the deck. Do we really want another?
I really only see Grafdigger's Cage coming in against the Burning Vengeance deck, it just seems too narrow for anything else. Midnight Guard is probably also sort of a sideboard card, where the body matches up against the opponent's threats enough that having two is valuable. Both seem like corner cases, but taking Midnight Guard sends a better signal and is a main deck card if we're desperate so I'm going to go with that.