Whenever Spireside Infiltrator becomes tapped, it deals 1 damage to each opponent.

Flying

Whenever a nontoken creature you control enters, you may pay . If you do, create a 1/1 white Spirit creature token with flying.

, Sacrifice a Spirit: Target non-Spirit creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Shadow (This creature can block or be blocked by only creatures with shadow.)

Forecast — , Reveal Spirit en-Dal from your hand: Target creature gains shadow until end of turn. (Activate only during your upkeep and only once each turn.)

Tap target untapped creature you control. If you do, it deals damage equal to its power to target attacking or blocking creature an opponent controls.

Flashback—, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant creature you control

Whenever enchanted creature deals damage, you gain that much life.

When Spirit Loop is put into a graveyard from the battlefield, return Spirit Loop to its owner's hand.

At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, create a 2/2 white Reflection creature token.

: Destroy target Reflection.

As long as you control a permanent of each color, prevent all damage that would be dealt to you.

Flying

You have hexproof. (You can't be the target of spells or abilities your opponents control.)

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

When Spirit of the Season enters, it gains haste if it's summer. Put a +1/+1 counter on it if it's autumn. You gain 5 life if it's winter. If it's spring, search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Enchant creature

Whenever enchanted creature becomes tapped, put a -0/-2 counter on it.

Create a 3/2 red and white Spirit creature token.

When Spirited Companion enters, draw a card.

At the beginning of your end step, choose target permanent card in your graveyard. You may sacrifice a permanent that shares a card type with the chosen card. If you do, return the chosen card from your graveyard to the battlefield and it gains "If this permanent would leave the battlefield, exile it instead of putting it anywhere else."

Whenever a spell or ability an opponent controls causes you to discard a card, you gain 2 life and you may draw a card.

At the beginning of each player's upkeep, if that player controls a Plains, they gain 1 life.

Until end of turn, whenever target creature deals damage, you gain that much life.

Draw a card.

During your turn, Spiteful Prankster has first strike.

Whenever another creature dies, Spiteful Prankster deals 1 damage to target player or planeswalker.

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Whenever Spiteful Returned or enchanted creature attacks, defending player loses 2 life.

Enchanted creature gets +1/+1.

Whenever Spitemare is dealt damage, it deals that much damage to any target.

Spitfire Handler can't block creatures with power greater than Spitfire Handler's power.

: Spitfire Handler gets +1/+0 until end of turn.

Whenever Spitting Dilophosaurus enters or attacks, put a -1/-1 counter on up to one target creature.

Creatures your opponents control with -1/-1 counters on them can't block.

Spitting Earth deals damage to target creature equal to the number of Mountains you control.

Spitting Hydra enters with four +1/+1 counters on it.

, Remove a +1/+1 counter from Spitting Hydra: It deals 1 damage to target creature.

Reach (This creature can block creatures with flying.)

Sacrifice a land: Spitting Spider deals 1 damage to each creature with flying.

Exile target creature you control, then return it to the battlefield under its owner's control. If that creature is a Bird, Frog, Otter, or Rat, draw a card.

When Splatter Goblin dies, target creature an opponent controls gets -1/-1 until end of turn.

Return all land cards from your graveyard to the battlefield tapped.

Create a 3/3 colorless Phyrexian Golem artifact creature token.

Splice onto instant or sorcery (As you cast an instant or sorcery spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Enchant creature

Enchanted creature has ": Create a token that's a copy of this creature, except it has haste. Exile that token at the beginning of the next end step."

: Splintering Wind deals 1 damage to target creature. Create a 1/1 green Splinter creature token. It has flying and "Cumulative upkeep ." When it leaves the battlefield, it deals 1 damage to you and each creature you control. (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)

Choose target player. Return half the creatures they control to their owner's hand, rounded up.

This spell costs less to cast for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

You gain 3 life and draw three cards.

X is the number of artifact and/or creature cards in an opponent's graveyard as you cast this spell.

Distribute X +1/+1 counters among any number of target creatures.

Create a 1/1 green Saproling creature token for each card in your hand.

Tap all blocking creatures. Prevent all combat damage that would be dealt this turn. Each attacking creature and each blocking creature doesn't untap during its controller's next untap step.

At the beginning of your upkeep, put a spore counter on Spore Flower.

Remove three spore counters from Spore Flower: Prevent all combat damage that would be dealt this turn.

Create three 1/1 green Saproling creature tokens.

During your turn, Sporeback Wolf gets +0/+2.

Each other creature you control that's a Fungus or Saproling gets +1/+1.

At the beginning of your upkeep, put a spore counter on each Fungus you control.

Remove three spore counters from Sporesower Thallid: Create a 1/1 green Saproling creature token.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)

Defender

Spore Chimney — When Sporocyst enters, search your library for up to X basic land cards, put them onto the battlefield tapped, then shuffle.

Enchant creature

When Sporogenic Infection enters, target player sacrifices a creature other than enchanted creature.

When enchanted creature is dealt damage, destroy it.

Flying

Destroy target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Spreading Flames deals 6 damage divided as you choose among any number of target creatures.

Whenever a creature enters, destroy all other creatures that share a color with it. They can't be regenerated.

Enchant land

When Spreading Seas enters, draw a card.

Enchanted land is an Island.

Destroy target enchantment. Clash with an opponent. If you win, destroy all enchantments your opponents control. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)