Lion Vulture

Flying (This creature can't be blocked except by creatures with flying or reach.)
At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on this creature and draw a card. (Damage causes loss of life.)

Dai Li Indoctrination

Choose one —
• Target opponent reveals their hand. You choose a nonland permanent card from it. That player discards that card.
• Earthbend 2. (Target land you control becomes a 0/0 creature with haste that's still a land. Put two +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)

Merchant of Many Hats

{2}{B}: Return this card from your graveyard to your hand.

Epic Downfall

Exile target creature with mana value 3 or greater.

Beetle-Headed Merchants

Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, draw a card and put a +1/+1 counter on this creature.

Attacking

Find ways to always attack
(Theme color: {B})

Heartless Act

Choose one —
• Destroy target creature with no counters on it.
• Remove up to three counters from target creature.

Purple Pentapus

When this creature enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
{2}{B}, Tap an untapped creature you control: Return this card from your graveyard to the battlefield tapped.

Pretending Poxbearers

When this creature dies, create a 1/1 white Ally creature token.

Corrupt Court Official

When this creature enters, target opponent discards a card.

Hei Bai, Spirit of Balance

Whenever Hei Bai enters or attacks, you may sacrifice another creature or artifact. If you do, put two +1/+1 counters on Hei Bai.
When Hei Bai leaves the battlefield, put its counters on target creature you control.

Fire Nation Ambushers

Flash (You may cast this spell any time you could cast an instant.)

Cat-Gator

Lifelink
When this creature enters, it deals damage equal to the number of Swamps you control to any target.

Swamp

Thriving Moor

This land enters tapped. As it enters, choose a color other than black.
{T}: Add {B} or one mana of the chosen color.