Defender

When Barrier of Bones enters the battlefield, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Changeling (This card is every creature type.)

As Bloodline Pretender enters the battlefield, choose a creature type.

Whenever another creature of the chosen type enters the battlefield under your control, put a +1/+1 counter on Bloodline Pretender.

Flying

{3}{B}{B}, Exile seven other cards from your graveyard: Return Bone Dragon from your graveyard to the battlefield tapped.

Changeling (This card is every creature type.)

As long as a creature card with flying is in a graveyard, Cairn Wanderer has flying. The same is true for fear, first strike, double strike, deathtouch, haste, landwalk, lifelink, protection, reach, trample, shroud, and vigilance.

{2}{B}{B}: Exile Carrionette and target creature unless that creature's controller pays {2}. Activate only if Carrionette is in your graveyard.

Changeling (This card is every creature type.)

Protection from black

{2}{G}{G}: Chameleon Colossus gets +X/+X until end of turn, where X is its power.

{3}{B}{B}, {T}, Sacrifice X other creatures: Return X target creature cards from your graveyard to the battlefield.

{5}{B}{B}: Put Champion of Stray Souls on top of your library from your graveyard.

Changeling (This card is every creature type.)

Changeling Outcast can't block and can't be blocked.

Clattering Augur can't block.

When Clattering Augur enters the battlefield, you draw a card and you lose 1 life.

{2}{B}{B}: Return Clattering Augur from your graveyard to your hand.

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch.

Menace

Negative Energy Cone -- Whenever an attacking creature you control or a blocking creature an opponent controls dies, create a 2/2 black Zombie creature token.

{5}{B}: Return Death Tyrant from your graveyard to the battlefield tapped.

Skeletons, Vampires, and Zombies you control get +1/+1.

At the beginning of your end step, if a creature died this turn, you may pay {1}. If you do, create a 1/1 black Skeleton creature token.

Whenever one or more creature cards leave your graveyard, create a 1/1 black Bat creature token with flying.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Sacrifice a creature: Regenerate Dimir House Guard.

Transmute {1}{B}{B} ({1}{B}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Golgari Grave-Troll enters the battlefield with a +1/+1 counter on it for each creature card in your graveyard.

{1}, Remove a +1/+1 counter from Golgari Grave-Troll: Regenerate Golgari Grave-Troll.

Dredge 6 (If you would draw a card, you may mill six cards instead. If you do, return this card from your graveyard to your hand.)

Golgari Rot Farm enters the battlefield tapped.

When Golgari Rot Farm enters the battlefield, return a land you control to its owner's hand.

{T}: Add {B}{G}.

When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

{1}{B}: Regenerate Grim Roustabout.

Gutterbones enters the battlefield tapped.

{1}{B}: Return Gutterbones from your graveyard to your hand. Activate only during your turn and only if an opponent lost life this turn.

Choose a creature type. Return up to two creature cards of that type from your graveyard to the battlefield. If this spell was foretold, return all creature cards of that type from your graveyard to the battlefield instead.

Foretell {5}{B}{B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

When Kjeldoran Dead enters the battlefield, sacrifice a creature.

{B}: Regenerate Kjeldoran Dead.

First strike

{1}{B}: Regenerate Lim-Dûl's High Guard.

Haste

{1}{B}: Regenerate Manor Skeleton.

{B}: Regenerate Marang River Skeleton.

Megamorph {3}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Whenever another creature you control dies, you get an experience counter.

At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

Kicker {3} (You may pay an additional {3} as you cast this spell.)

If Moss-Pit Skeleton was kicked, it enters the battlefield with three +1/+1 counters on it.

Whenever one or more +1/+1 counters are put on a creature you control, if Moss-Pit Skeleton is in your graveyard, you may put Moss-Pit Skeleton on top of your library.

Other black creatures you control get +1/+1.

{2}{B}, {T}: Another target black creature you control gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.)

{2}{B}: Return Persistent Specimen from your graveyard to the battlefield tapped.

{B}: Regenerate Phyrexian Monitor.

{1}{B}: Return Reassembling Skeleton from your graveyard to the battlefield tapped.

{B}: Regenerate Restless Dead.

{S}: Regenerate Rimebound Dead. ({S} can be paid with one mana from a snow source.)

Rot Farm Skeleton can't block.

{2}{B}{G}, Mill four cards: Return Rot Farm Skeleton from your graveyard to the battlefield. Activate only as a sorcery.

{2}{B}: Return Sanitarium Skeleton from your graveyard to your hand.

Changeling (This card is every creature type.)

{1}{B}: Regenerate Skeletal Changeling.

Each Skeleton you control has trample, attacks each combat if able, and gets +X/+0, where X is the number of other Skeletons you control.

At the beginning of your end step, create a tapped 1/1 black Skeleton creature token. If a creature died this turn, create two of those tokens instead.

{B}: Regenerate Skeletal Wurm.

When Skeleton Archer enters the battlefield, it deals 1 damage to any target.

Skeleton Scavengers enters the battlefield with a +1/+1 counter on it.

Pay {1} for each +1/+1 counter on Skeleton Scavengers: Regenerate Skeleton Scavengers. When it regenerates this way, put a +1/+1 counter on it.

Flying

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

{B}: Skithiryx, the Blight Dragon gains haste until end of turn.

{B}{B}: Regenerate Skithiryx.

Spawning Pool enters the battlefield tapped.

{T}: Add {B}.

{1}{B}: Spawning Pool becomes a 1/1 black Skeleton creature with "{B}: Regenerate this creature" until end of turn. It's still a land. (If it regenerates, the next time it would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

When Tenacious Dead dies, you may pay {1}{B}. If you do, return it to the battlefield tapped under its owner's control.

Whenever Underworld Sentinel attacks, exile target creature card from your graveyard.

When Underworld Sentinel dies, put all cards exiled with it onto the battlefield.

{B}: Regenerate Unworthy Dead.

Kicker {3} (You may pay an additional {3} as you cast this spell.)

{B}: Regenerate Urborg Skeleton.

If Urborg Skeleton was kicked, it enters the battlefield with a +1/+1 counter on it.

Changeling (This card is every creature type.)

Deathtouch

Defender (This creature can't attack.)

{B}: Regenerate Wall of Bone. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

{T}: Add {C}.

{5}, {T}, Pay 1 life: Create a 1/1 white and black Human Cleric creature token.

{5}, {T}, Sacrifice five creatures: Transform Westvale Abbey, then untap it.

Flying, lifelink, indestructible, haste