Thoughtbound Phantasm

Defender
Whenever you surveil, put a +1/+1 counter on this creature.
As long as this creature has three or more +1/+1 counters on it, it can attack as though it didn't have defender.

Spectral Sailor

Flash (You may cast this spell any time you could cast an instant.)
Flying
{3}{U}: Draw a card.

Watcher in the Mist

Flying
When this creature enters, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Grateful Apparition

Flying
Whenever this creature deals combat damage to a player or planeswalker, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Hanged Executioner

Flying
When this creature enters, create a 1/1 white Spirit creature token with flying.
{3}{W}, Exile this creature: Exile target creature.

Vivien's Jaguar

Reach (This creature can block creatures with flying.)
{2}{G}: Return this card from your graveyard to your hand. Activate only if you control a Vivien planeswalker.

Ugin's Conjurant

This creature enters with X +1/+1 counters on it.
If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from this creature.

Spirit of the Spires

Flying
Other creatures you control with flying get +0/+1.

Dungeon Geists

Flying
When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature.

Yargle, Glutton of Urborg

Vivien's Crocodile

This creature gets +1/+1 as long as you control a Vivien planeswalker.

Remorseful Cleric

Flying
Sacrifice this creature: Exile target player's graveyard.

Celestial Messenger

Flash (You may cast this card any time you could cast an instant.)
Flying
This creature gets +1/+1 as long as you control a Yanling planeswalker.

Vivien's Grizzly

{3}{G}: Look at the top card of your library. If it's a creature or planeswalker card, you may reveal it and put it into your hand. If you don't put the card into your hand, put it on the bottom of your library.

Twilight Panther

{B}: This creature gains deathtouch until end of turn.

Forbidding Spirit

When this creature enters, until your next turn, creatures can't attack you or planeswalkers you control unless their controller pays {2} for each of those creatures.

Ethereal Elk

Trample
When this creature enters, you may search your library and/or graveyard for a card named Vivien, Nature's Avenger, reveal it, and put it into your hand. If you search your library this way, shuffle.

Sanctum Spirit

Lifelink
Discard a historic card: This creature gains indestructible until end of turn. (Artifacts, legendaries, and Sagas are historic.)

Departed Deckhand

When this creature becomes the target of a spell, sacrifice it.
This creature can't be blocked except by Spirits.
{3}{U}: Another target creature you control can't be blocked this turn except by Spirits.

Vampire Revenant

Gravewaker

Flying (This creature can't be blocked except by creatures with flying or reach.)
{5}{B}{B}: Return target creature card from your graveyard to the battlefield tapped.

Skalla Wolf

When this creature enters, look at the top five cards of your library. You may reveal a green card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Pestilent Spirit

Menace, deathtouch
Instant and sorcery spells you control have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)

Basilica Bell-Haunt

When this creature enters, each opponent discards a card and you gain 3 life.

Empyrean Eagle

Flying
Other creatures you control with flying get +1/+1.

Lingering Phantom

Whenever you cast a historic spell, you may pay {B}. If you do, return this card from your graveyard to your hand. (Artifacts, legendaries, and Sagas are historic.)