At the beginning of your upkeep and whenever you cast a black spell, put a charge counter on Shrine of Limitless Power.

, , Sacrifice Shrine of Limitless Power: Target player discards a card for each charge counter on Shrine of Limitless Power.

Enchant creature

Enchanted creature gets -1/-1.

Cycling (, Discard this card: Draw a card.)

Eminence — Whenever you attack with one or more Knights, if Sidar Jabari of Zhalfir is in the command zone or on the battlefield, draw a card, then discard a card.

Flying, first strike

Whenever Sidar Jabari deals combat damage to a player, return target Knight creature card from your graveyard to the battlefield.

Draw two cards, then discard a card.

If you've cast a spell named Peer Through Depths and a spell named Reach Through Mists this turn, you may search your library for a card named The Unspeakable, put it onto the battlefield, then shuffle.

When Sigardian Evangel enters the battlefield, conjure a card named Sigardian Evangel into your hand. Discard that card at the beginning of the next end step.

When Sigardian Evangel enters the battlefield, tap target permanent you don't control.

Flying

Whenever Silent Specter deals combat damage to a player, that player discards two cards.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Discard a land card: Simian Brawler gets +1/+1 until end of turn.

, Pay 1 life, Mill a card, Discard a card, Sacrifice Sinister Concoction: Destroy target creature.

: Sinuous Striker gets +1/-1 until end of turn.

Eternalize—, Discard a card. (, Discard a card, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Snake Warrior with no mana cost. Eternalize only as a sorcery.)

Flying

Inspired — Whenever Siren of the Silent Song becomes untapped, each opponent discards a card, then each opponent mills a card.

Reach

Whenever Six attacks, mill three cards. You may put a land card from among them into your hand.

During your turn, nonland permanent cards in your graveyard have retrace. (You may cast permanent cards from your graveyard by discarding a land card in addition to paying their other costs.)

Equipped creature has skulk. (It can't be blocked by creatures with greater power.)

Whenever equipped creature deals combat damage to a player, you may draw a card. If you do, discard a card.

Equip

Flying

Discard a card: Add .

, , Discard a card: Each player loses 2 life.

During your turn, Skophos Reaver gets +2/+0.

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.)

Target opponent discards two cards. If fewer than two cards were discarded this way, you draw cards equal to the difference.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Whenever Skullknocker Ogre deals damage to an opponent, that player discards a card at random. If the player does, they draw a card.

Target player discards two cards at random unless that player has Skullscorch deal 4 damage to them.

Flying

When Sky-Eel School enters, draw a card, then discard a card.

Flying

Whenever an artifact you control enters, you may draw a card. If you do, discard a card.

, , Discard your hand: Draw a card for each creature you control.

Bloodrush — , Discard Slaughterhorn: Target attacking creature gets +3/+2 until end of turn.

Whenever Slavering Nulls deals combat damage to a player, if you control a Swamp, you may have that player discard a card.

Slippery Karst enters tapped.

: Add .

Cycling (, Discard this card: Draw a card.)

, , Discard a card: Create a 1/1 colorless Sliver artifact creature token named Metallic Sliver.

Whenever Sly Spy deals combat damage to a player, that player reveals their hand. You choose a card from it with the longest name. That player discards that card.

Smoldering Crater enters tapped.

: Add .

Cycling (, Discard this card: Draw a card.)

You may discard a Forest card rather than pay this spell's mana cost.

Prevent all combat damage that would be dealt by unblocked creatures this turn.

Flying

When Soaring Sandwing enters, you gain 3 life.

Plainscycling (, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

: Add .

Channel — , Discard Sokenzan, Crucible of Defiance: Create two 1/1 colorless Spirit creature tokens. They gain haste until end of turn. This ability costs less to activate for each legendary creature you control.

, Sacrifice two lands: Draw three cards, then discard one of them.

If a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals double that damage to that player or permanent instead.

, Discard two cards: Put an indestructible counter on Solphim, Mayhem Dominus. ( can be paid with either or 2 life.)

Tap target creature. Sonic Assault deals 2 damage to that creature's controller.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

As an additional cost to cast this spell, discard a card at random.

Sonic Seizure deals 3 damage to any target.

, , Discard a card: You gain 2 life for each card in your hand.

Flying

, Return two lands you control to their owner's hand: Discard all the cards in your hand, then draw that many cards.

Whenever Soul of Windgrace enters or attacks, you may put a land card from a graveyard onto the battlefield tapped under your control.

, Discard a land card: You gain 3 life.

, Discard a land card: Draw a card.

, Discard a land card: Soul of Windgrace gains indestructible until end of turn. Tap it.

Target player sacrifices a nontoken creature. When they do, you may discard a card. If you do, conjure a duplicate of the sacrificed creature into your hand. It perpetually gains "You may spend mana as though it were mana of any color to cast this spell."

(: Add , , or .)

Spara's Headquarters enters tapped.

Cycling (, Discard this card: Draw a card.)

As an additional cost to cast this spell, discard a card.

Protection from planeswalkers

: Sparkhunter Masticore deals 1 damage to target planeswalker.

: Sparkhunter Masticore gains indestructible until end of turn.

When Sparring Regimen enters, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

Whenever you attack, put a +1/+1 counter on target attacking creature and untap it.

Target player discards a card at random.

Counter target spell unless its controller pays .

Cycling (, Discard this card: Draw a card.)

When Spellgorger Barbarian enters, discard a card at random.

When Spellgorger Barbarian leaves the battlefield, draw a card.

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

Flying

When Sphinx of Lost Truths enters, draw three cards. Then if it wasn't kicked, discard three cards.

Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.

: Draw a card, then discard a card.

Whenever a player discards a card, you may pay . If you do, create a 1/1 white Spirit creature token with flying.

Create a token that's a copy of target creature.

Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

When Splitskin Doll enters, draw a card. Then discard a card unless you control another creature with power 2 or less.

Spymaster's Vault enters tapped unless you control a Swamp.

: Add .

, : Target creature you control connives X, where X is the number of creatures that died this turn. (Draw X cards, then discard X cards. Put a +1/+1 counter on that creature for each nonland card discarded this way.)