Protection from black

At the beginning of your upkeep, sacrifice Anurid Scavenger unless you put a card from your graveyard on the bottom of your library.

Sacrifice Cephalid Snitch: Target creature loses protection from black until end of turn.

Flying

Threshold — As long as seven or more cards are in your graveyard, Mystic Familiar gets +1/+1 and has protection from black.

Protection from black

Threshold — Nantuko Blightcutter gets +1/+1 for each black permanent your opponents control as long as seven or more cards are in your graveyard.

Enchant creature

Enchanted creature gets +1/+2 and has protection from black.

Madness {W} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Flash

Threshold — As long as seven or more cards are in your graveyard, Teroh’s Vanguard has “When Teroh’s Vanguard enters the battlefield, creatures you control gain protection from black until end of turn.”