Delve (Each card you exile from your graveyard while casting this spell pays for .)

When Sibsig Muckdraggers enters, return target creature card from your graveyard to your hand.

Flash

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters, create that many tokens that are copies of it.)

Benediction of the Omnissiah — When Sicarian Infiltrator enters, draw a card.

Enchant creature

Enchanted creature gets -1/-1.

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

You may exile a black card with mana value X from your hand rather than pay this spell's mana cost.

Target creature gets -X/-X until end of turn.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

Whenever Sidar Jabari attacks, tap target creature defending player controls.

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

Creatures your opponents control without flying or reach can't block creatures with power 2 or less.

Partner (You can have two commanders if both have partner.)

You and target opponent arm-wrestle. If you win, create a 3/3 green Ape creature token.

As long as you control a Desert or there is a Desert card in your graveyard, Sidewinder Naga gets +1/+0 and has trample.

Whenever Sidisi, Brood Tyrant enters or attacks, mill three cards.

Whenever one or more creature cards are put into your graveyard from your library, create a 2/2 black Zombie creature token.

Exploit (When this creature enters, you may sacrifice a creature.)

When Sidisi's Faithful exploits a creature, return target creature to its owner's hand.

Hexproof

As long as Siege Behemoth is attacking, for each creature you control, you may have that creature assign its combat damage as though it weren't blocked.

Trample

Untapped creatures can't block.

Tapped creatures can block.

Enchant creature or Vehicle

As long as enchanted permanent is a Vehicle, it's a creature in addition to its other types.

Enchanted creature gets +3/+0 and has first strike.

Trample

When Siege Rhino enters, each opponent loses 3 life and you gain 3 life.

Double strike (This creature deals both first-strike and regular combat damage.)

Whenever Siege Striker attacks, you may tap any number of untapped creatures you control. Siege Striker gets +1/+1 until end of turn for each creature tapped this way.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Trample

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

: Target creature can't block this turn.

When Siege-Gang Commander enters, create three 1/1 red Goblin creature tokens.

, Sacrifice a Goblin: Siege-Gang Commander deals 2 damage to any target.

Enrage — Whenever Siegehorn Ceratops is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.)

Draw three cards, then discard a card.

Devoid (This card has no color.)

Whenever another nontoken creature you control dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add ." ( represents colorless mana.)

Flying, trample

Humans you control get +1/+1.

Coven — Whenever Sigarda attacks, if you control three or more creatures with different powers, look at the top five cards of your library. You may reveal a Human creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying

You and Humans you control have hexproof.

, Exile a card from your graveyard: Create a 1/1 white Human Soldier creature token.

You may cast Aura and Equipment spells as though they had flash.

Whenever an Equipment you control enters, you may attach it to target creature you control.

As Sigarda's Splendor enters, note your life total.

At the beginning of your upkeep, draw a card if your life total is greater than or equal to the last noted life total for Sigarda's Splendor. Then note your life total.

Whenever you cast a white spell, you gain 1 life.

Flash

Flying

Whenever Sigarda's Vanguard enters or attacks, choose any number of creatures with different powers. Those creatures gain double strike until end of turn.

As long as you've put one or more +1/+1 counters on a creature this turn, Sigardian Paladin has trample and lifelink.

: Target creature you control with a +1/+1 counter on it gains trample and lifelink until end of turn.

Flying

When Sigardian Savior enters, if you cast it, return up to two target creature cards with mana value 2 or less from your graveyard to the battlefield.

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

: Sighted-Caste Sorcerer gains shroud until end of turn. (It can't be the target of spells or abilities.)

Sightless Ghoul can't block.

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Whenever a creature you control enters, if that creature is 1/1, put two +1/+1 counters on it.

At the beginning of combat on your turn, mill a card. When you do, if there are four or more creature cards in your graveyard, put a +1/+1 counter on target creature you control and it gains deathtouch until end of turn. (To mill a card, put the top card of your library into your graveyard.)

Whenever you cast an enchantment spell, create a 4/4 white Angel creature token with flying.

Whenever a creature is put into your graveyard from the battlefield, you may pay . If you do, return that card to your hand.

, Tap two untapped Wizards you control: Copy target instant or sorcery spell. You may choose new targets for the copy.

Sigiled Contender has lifelink as long as it has a +1/+1 counter on it. (Damage dealt by this creature also causes you to gain that much life.)

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.)

Vigilance

: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Target player draws two cards and loses 2 life.

Search your library for three creature cards and reveal them. If you reveal three cards with different names, choose one of them at random and put that card into your hand. Shuffle the rest into your library.

When Signature Spells enters the battlefield, seek two instant and/or sorcery cards with mana value 3, then exile them.

At the beginning of your upkeep, you may copy a card exiled with Signature Spells. You may cast the copy without paying its mana cost.

Flash

First strike, protection from God creatures

When Sigrid, God-Favored enters, exile up to one target attacking or blocking creature until Sigrid leaves the battlefield.

Deathtouch

Whenever Silas Renn, Seeker Adept deals combat damage to a player, choose target artifact card in your graveyard. You may cast that card this turn.

Partner (You can have two commanders if both have partner.)

Your opponents can't cast spells this turn.

No more than one creature can attack each combat.

No more than one creature can block each combat.

: Destroy target blocking creature at end of combat.

, Pay 1 life: Add or .

, , Sacrifice Silent Clearing: Draw a card.

Return target creature to its owner's hand.

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