Doomed Traveler

When Doomed Traveler dies, create a 1/1 white Spirit creature token with flying.

Plains

Island

Niblis of the Breath

Flying
{U}, {T}: You may tap or untap target creature.

Midnight Haunting

Create two 1/1 white Spirit creature tokens with flying.

Mausoleum Guard

When Mausoleum Guard dies, create two 1/1 white Spirit creature tokens with flying.

Amphin Pathmage

{2}{U}: Target creature can't be blocked this turn.

Lantern Spirit

Flying
{U}: Return Lantern Spirit to its owner's hand.

Spectral Procession

Create three 1/1 white Spirit creature tokens with flying.

Thousand Winds

Flying
Morph {5}{U}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Thousand Winds is turned face up, return all other tapped creatures to their owners' hands.

Unsummon

Return target creature to its owner's hand.

Feeling of Dread

Tap up to two target creatures.
Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Tower Geist

Flying
When Tower Geist enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

Zephyr Charge

{1}{U}: Target creature gains flying until end of turn.

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Dungeon Geists

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

Geist of the Moors

Spectral Rider

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Spirit of the Labyrinth

Each player can't draw more than one card each turn.

Drogskol Captain

Flying
Other Spirit creatures you control get +1/+1 and have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Seraph of the Sword

Flying
Prevent all combat damage that would be dealt to Seraph of the Sword.

Chapel Geist

Master of Diversion

Whenever Master of Diversion attacks, tap target creature defending player controls.

Runner's Bane

Enchant creature with power 3 or less
When Runner's Bane enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Angel of Flight Alabaster

Flying
At the beginning of your upkeep, return target Spirit card from your graveyard to your hand.

Stormbound Geist

Flying
Stormbound Geist can block only creatures with flying.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Ascended Lawmage

Flying
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Frost Breath

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.