Stronghold

{T}: Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)

Mogg Flunkies can't attack or block alone.

When another creature enters the battlefield, sacrifice Mogg Bombers and it deals 3 damage to target player or planeswalker.

{R}: Flowstone Shambler gets +1/-1 until end of turn.

Haste {0}: Flowstone Hellion gets +1/-1 until end of turn.

Trample {0}: The next 1 damage that would be dealt to Lancers en-Kor this turn is dealt to target creature you control instead.

{1}{R}: Target creature can't block Duct Crawler this turn.

Craven Giant can't block.

{R}, {T}: Convulsing Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay {R} ...

Other black creatures get -1/-1.

{T}, Sacrifice a creature: Destroy target nonblack creature.

{W}: Honor Guard gets +0/+1 until end of turn.

When Serpent Warrior enters the battlefield, you lose 3 life.

{T}: Target blocking creature gets -1/-1 until end of turn.

Sacrifice Morgue Thrull: Put the top three cards of your library into your graveyard.

Flying {B}: Dungeon Shade gets +1/+1 until end of turn.

{B}, {T}: Corrupting Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay {B} ...

Walking Dream can't be blocked. Walking Dream doesn't untap during your untap step if an opponent controls two or more creatures.

{T}: Target land becomes an Island until end of turn.

Hammerhead Shark can't attack unless defending player controls an Island.

{U}, {T}: Gliding Licid loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay {U} to ...

Dream Prowler can't be blocked as long as it's attacking alone.

Flying Cloud Spirit can block only creatures with flying.

First strike