Archangel Avacyn
: Embodies the deck concept: flash, indestructible, flying, vigilance, boardwipe. Four of recommended!
Thunderclap Wyvern
: Flash and pumps a lot of your other creatures. Two of is plenty.
Reflector Mage
: Great tempo play, bonce a creature to swing in with your two drop. Easy four of.
Dimensional Infiltrator
: Flash, flying and can bounce itself? Sign me up! Four of indeed!
Stasis Snare
: Instant speed, versatile removal. Two is the perfect amount, could easily see playing more.
Icefall Regent
: Amazing. Essentially removes a creature when it enters, flying, and resistant to removal? Four of certainly.
Whirler Rogue
: Can make things unblockable, makes three bodies, flyers. Great four of.
Stratus Dancer
: Morphable flying counterspell
on a stick? Sign me up for three please, because the humans deck doesn't run many instants or sorceries. . (Pro Tip: Us it to counter a removal spell!)
Vryn Wingmare
: Makes removal spells cost more? Flying? Great two of, because of the lack of noncreature spells in humans, spirits, and "Dredge". Bring in the other two against almost any other deck.
Geralf's Masterpiece
: Huge flying threat that you can recur. Four of, please.
Always Watching
: Nuff said. Not much synergy, so one of is good.
Thraben Inspector
: Great turn one play. Chumps well and leaves behind a clue. Two of is fine.
Kytheon, Hero of Akros
: Good turn two or three play, grants indestructible and can make tokens. Two is a good amount.
Gideon, Ally of Zendikar
: The emblem, tokens, indestructible. Yes please. Two of because of lack of synergy.