Whenever Street Sweeper attacks, destroy all Auras attached to target land.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

This creature assigns combat damage equal to its toughness rather than its power.

: Add one mana of any color.

, : Put X +1/+1 counters on target creature, where X is the number of Bobbleheads you control. Activate only as a sorcery.

Until end of turn, target creature gains trample and gets +X/+X, where X is the number of attacking creatures.

Target creature gets +X/+X until end of turn, where X is the number of lands you control.

Enchant creature

Enchanted creature gets +2/+1 and has protection from white.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Choose target creature you control. Put a +1/+1 counter on it for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Enchant creature

Enchanted creature gets +1/+1 for each creature and/or enchantment you control.

Multikicker (You may pay an additional any number of times as you cast this spell.)

Choose target creature, then choose another target creature for each time this spell was kicked. Put X +1/+1 counters on each of them.

Whenever equipped creature attacks, roll a six-sided die. That creature gets +X/+0 until end of turn, where X is the result. Then if it has the greatest power or is tied for greatest power among creatures on the battlefield, draw a card.

Equip

Equipped creature gets +1/+1 and has haste.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Return target creature to its owner's hand. Then that creature's controller may pay . If the player does, they may copy this spell and may choose a new target for that copy.

Destroy all Auras and Equipment attached to target creature.

When Striped Bears enters, draw a card.

Flying, vigilance (Attacking doesn't cause this creature to tap.)

, : Draw a card, then discard a card.

: Add . Put a point counter on Strixhaven Stadium.

Whenever a creature deals combat damage to you, remove a point counter from Strixhaven Stadium.

Whenever a creature you control deals combat damage to an opponent, put a point counter on Strixhaven Stadium. Then if it has ten or more point counters on it, remove them all and that player loses the game.

Look at the top four cards of your library. Choose one of them and put all cards with the same name as the chosen card from among them into your hand. You lose 1 life for each card put into your hand this way. Put the rest on the bottom of your library in a random order.

, Pay 1 life: Counter target white spell.

Whenever Stromgald Spy attacks and isn't blocked, you may have defending player play with their hand revealed for as long as Stromgald Spy remains on the battlefield. If you do, Stromgald Spy assigns no combat damage this turn.

First strike

Other Vampire creatures you control get +1/+1 and have first strike.

When Stromkirk Mentor enters, put a +1/+1 counter on another target Vampire you control.

Trample

Whenever Stromkirk Occultist deals combat damage to a player, exile the top card of your library. Until end of turn, you may play that card.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Enchant creature

Equip abilities you activate that target enchanted creature cost less to activate.

Aura spells you cast that target enchanted creature cost less to cast.

Enchanted creature gets +2/+2 for each Aura and Equipment attached to it.

Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn.

When Strongarm Thug enters, you may return target Mercenary card from your graveyard to your hand.

Kicker and/or (You may pay an additional and/or as you cast this spell.)

When Stronghold Arena enters, you gain 3 life for each time it was kicked.

Whenever one or more creatures you control deal combat damage to a player, you may reveal the top card of your library and put it into your hand. If you do, you lose life equal to its mana value.

, , Discard a card: Counter target creature spell.

Each player loses 1 life for each creature they control.

, , Discard a card: Counter target noncreature spell.

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

Whenever Stronghold Rats deals combat damage to a player, each player discards a card.

Flying

Stronghold Zeppelin can block only creatures with flying.

Target player sacrifices an artifact and a land of their choice. Structural Collapse deals 2 damage to that player.

Struggle deals damage to target creature equal to the number of lands you control.

Target opponent reveals their hand. That player exiles a card from it, then you exile a card from it. Repeat this process until all cards in that hand have been exiled. That player returns the cards they exiled this way to their hand and puts the rest into their graveyard.

When this creature enters,

exile target creature card with mana value 2 or less from your graveyard. If it has augment, combine it with a host you control. Otherwise, put it onto the battlefield.

Counter target noncreature spell unless its controller pays .

Ferocious — If you control a creature with power 4 or greater, counter that spell instead.

Whenever you cast a noncreature spell, you gain 2 life.

Study enters tapped.

: Add or .

, : Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

: Add .

, : Add one mana of any color. When you spend this mana to cast your commander, scry X, where X is the number of times it's been cast from the command zone this game.

Indestructible

As Stuffy Doll enters, choose a player.

Whenever Stuffy Doll is dealt damage, it deals that much damage to the chosen player.

: Stuffy Doll deals 1 damage to itself.

When Stumpsquall Hydra enters, distribute X +1/+1 counters among it and any number of commanders.

, : Stun Sniper deals 1 damage to target creature. Tap that creature.

Flash

Enchant creature

When Stunning Strike enters, tap enchanted creature and remove it from combat.

As long as enchanted creature isn't legendary, it doesn't untap during its controller's untap step.

Target player chooses three cards from their hand and puts them on top of their library in any order.

Target opponent discards a card at random, then discards a card.

Flying

Sturmgeist's power and toughness are each equal to the number of cards in your hand.

Whenever Sturmgeist deals combat damage to a player, draw a card.

A person outside the game looks at target opponent's hand and chooses a nonland card from it. That player discards that card.

Subgoyf's power and toughness are each equal to the number of different subtypes other than creature types among cards in all graveyards and its toughness is equal to that number plus 1. (Subtypes include but are absolutely not limited to: Plains, Equipment, Aura, Arcane, Jace, Curse, Urza's, Ulamog's, etc.)