Whenever another nontoken creature enters the battlefield under your control, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Whenever you cast a Spirit or Arcane spell, put a +1/+1 counter on target creature.

Flying Whenever you cast a creature spell with mana value 3 or less, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Flying Whenever you cast a Spirit or Arcane spell, destroy all permanents with that spell's mana value.

Whenever you cast a Spirit or Arcane spell, reveal the top three cards of your library. Put all land cards revealed this way into your hand and the rest on the bottom of your library in any order. Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)

Whenever you cast a creature spell, you may pay {1}. If you do, return target creature to its owner's hand.

Whenever you cast a Spirit or Arcane spell, each other creature you control gets +1/+1 and gains trample until end of turn.

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

Whenever you cast a Spirit or Arcane spell, you may put a land card from your hand onto the battlefield tapped.

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

Flying Whenever you cast a Spirit or Arcane spell, create a 3/3 white Spirit creature token with flying.

Whenever you cast a creature spell, you may draw a card.

Flying Whenever you cast a Spirit or Arcane spell, you may draw a card.

Flying {1}{U}: Return target Spirit you control to its owner's hand.

Undaunted (This spell costs {1} less to cast for each opponent.) Return all nonland permanents to their owners' hands.

Changeling (This card is every creature type.) Exile target creature. Its controller creates a 1/1 colorless Shapeshifter creature token with changeling.

Surge {3}{U}{U} (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.) Return all nonland permanents to their owners' hands. If this spell's surge cost was paid, create an 8/8 blue Octopus creature token.

Each player chooses a creature type. Destroy all creatures that aren't of a type chosen this way. They can't be regenerated.

Destroy target artifact or enchantment if its mana value is less than or equal to the number of cards in your hand. Draw a card.

Destroy target artifact or enchantment. You gain life equal to its mana value.

Return a creature you control to its owner's hand, then destroy all creatures.

({T}: Add {G}.)

({T}: Add {U}.)

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

{T}: Add {C}. {W}{U}, {T}, Exile a creature card from your graveyard: Create a 1/1 white Spirit creature token with flying.

{3}{U}, {T}: Counter target spell unless its controller pays {2}. Channel — {3}{U}, Discard Ghost-Lit Warder: Counter target spell unless its controller pays {4}.

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

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {1}."

Sacrifice Keening Apparition: Destroy target enchantment.

Flying Whenever another Spirit enters the battlefield under your control, Mausoleum Wanderer gets +1/+1 until end of turn. Sacrifice Mausoleum Wanderer: Counter target instant or sorcery spell unless its controller pays {X}, where X is Mausoleum Wanderer's power.

When Nikko-Onna enters the battlefield, destroy target enchantment. Whenever you cast a Spirit or Arcane spell, you may return Nikko-Onna to its owner's hand.

Flying Sacrifice Remorseful Cleric: Exile target player's graveyard.

All creatures able to block Shinen of Life's Roar do so. Channel — {2}{G}{G}, Discard Shinen of Life's Roar: All creatures able to block target creature this turn do so.

Flying {T}, Tap two untapped creatures you control: Return target permanent to its owner's hand.

As Door of Destinies enters the battlefield, choose a creature type. Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies. Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.

As Kindred Discovery enters the battlefield, choose a creature type. Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.

Changeling (This card is every creature type.) {X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

As Mirror of the Forebears enters the battlefield, choose a creature type. {1}: Until end of turn, Mirror of the Forebears becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types.

Changeling (This card is every creature type.) {2}{U}: Target Shapeshifter becomes a copy of target creature until your next turn.

Whenever a nontoken creature enters the battlefield under your control, you may pay {W}. If you do, create a 1/1 white Spirit creature token with flying. {1}{W}, Sacrifice a Spirit: Target non-Spirit creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

As Steely Resolve enters the battlefield, choose a creature type. Creatures of the chosen type have shroud. (They can't be the targets of spells or abilities.)

Changeling (This card is every creature type.) Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.

As Urza's Incubator enters the battlefield, choose a creature type. Creature spells of the chosen type cost {2} less to cast.

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

Defender (This creature can't attack.) When Carven Caryatid enters the battlefield, draw a card.

Choose a permanent type. Return all cards of the chosen type from your graveyard to your hand. Flashback {5}{G}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Defender (This creature can't attack.) Flying Transmute {1}{U}{U} ({1}{U}{U}, 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.)

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.)

Soulshift 4, soulshift 4 (When this creature dies, you may return up to two target Spirit cards with mana value 4 or less from your graveyard to your hand.)

When Iname, Life Aspect dies, you may exile it. If you do, return any number of target Spirit cards from your graveyard to your hand.

Flying Creatures you control have "Whenever this creature becomes the target of a spell or ability for the first time each turn, counter that spell or ability."

{T}, Sacrifice three Spirits: Search your library for a legendary Spirit permanent card, put it onto the battlefield, then shuffle.

Whenever Permeating Mass deals combat damage to a creature, that creature becomes a copy of Permeating Mass.

Flash Flying When Rattlechains enters the battlefield, target Spirit gains hexproof until end of turn. You may cast Spirit spells as though they had flash.

Flying Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.

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