Whenever you cast a Spirit or Arcane spell, you may put a ki counter on Baku Altar.

, , Remove a ki counter from Baku Altar: Create a 1/1 colorless Spirit creature token.

Flying

Whenever you cast a Spirit or Arcane spell, you may gain life equal to that spell's mana value.

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on Budoka Pupil.

At the beginning of the end step, if there are two or more ki counters on Budoka Pupil, you may flip it.

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, you may put a ki counter on Cunning Bandit.

At the beginning of the end step, if there are two or more ki counters on Cunning Bandit, you may flip it.

Whenever you cast a Spirit or Arcane spell, Earthshaker deals 2 damage to each creature without flying.

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 Spirit or Arcane spell, regenerate Fiddlehead Kami.

Partner with Pako, Arcane Retriever (When this creature enters the battlefield, target player may put Pako into their hand from their library, then shuffle.)

You may play lands and cast noncreature spells from among cards you exiled that have fetch counters on them, and you may spend mana as though it were mana of any color to cast those spells.

When Haru-Onna enters the battlefield, draw a card.

Whenever you cast a Spirit or Arcane spell, you may return Haru-Onna to its owner's hand.

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on Hired Muscle.

At the beginning of the end step, if there are two or more ki counters on Hired Muscle, you may flip it.

Whenever you cast a Spirit or Arcane spell, regenerate target creature.

Flying

Whenever you cast a Spirit or Arcane spell, target player reveals their hand and discards all cards with that spell's mana value.

Ire of Kaminari deals damage to any target equal to the number of Arcane cards in your graveyard.

Return up to two target creatures to their owner's hand. You may search your library and/or graveyard for a card named Jace, Arcane Strategist, reveal it, and put it into your hand. If you search your library this way, shuffle.

Remove a ki counter from Jaraku the Interloper: Counter target spell unless its controller pays .

Whenever you cast a Spirit or Arcane spell, target creature can't block this turn.

Whenever you cast a Spirit or Arcane spell, Kami of the Hunt gets +1/+1 until end of turn.

Flying

Whenever you cast a Spirit or Arcane spell, target creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

When Kiri-Onna enters the battlefield, return target creature to its owner's hand.

Whenever you cast a Spirit or Arcane spell, you may return Kiri-Onna 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.

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

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.

Whenever you cast a Spirit or Arcane spell, you may destroy target nonbasic land.

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on Petalmane Baku.

, Remove X ki counters from Petalmane Baku: Add X mana of any one color.

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on Quillmane Baku.

, , Remove X ki counters from Quillmane Baku: Return target creature with mana value X or less to its owner's hand.

Remove a ki counter from Scarmaker: Target creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Flying

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

Flying

Whenever you cast a Spirit or Arcane spell, you may gain control of target creature with that spell's mana value until end of turn.

Whenever you cast a Spirit or Arcane spell, target land becomes a 3/3 creature until end of turn. It's still a land.

Whenever you cast a Spirit or Arcane spell, you may search your library for an Aura card with enchant creature, reveal it, put it into your hand, then shuffle.

Arcane Life-support — If you would lose the game, instead exile The Golden Throne and your life total becomes 1.

A Thousand Souls Die Every Day — , Sacrifice a creature: Add three mana in any combination of colors.

Whenever you cast a Spirit or Arcane spell, target opponent loses 1 life and you gain 1 life.

Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)

When Yuki-Onna enters the battlefield, destroy target artifact.

Whenever you cast a Spirit or Arcane spell, you may return Yuki-Onna to its owner's hand.