msem-instigator

First strike
Whenever Silverblade Cathar and at least two other creatures attack, draw a card.

When Silvershot Crossbow enters, it deals 3 damage to target creature an opponent controls. If that creature is transformed, Silvershot Crossbow deals 13 damage to it instead.
Equipped creature has reach and “{T}: This creature deals 1 damage to each opponent.”
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

{T}, Sacrifice Sinister Thicket: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{4}, Exile Sinister Thicket from your graveyard: Draw a card. Activate only as a sorcery.

Vigilance
When Skaab Grappler enters, you may exile two creature cards from your graveyard. When you do, return another target creature to its owner's hand.

Choose one —
• Each opponent sacrifices a creature.
• Each opponent sacrifices a planeswalker.
• Each opponent sacrifices an enchantment.
Flashback—{4}{B}, Discard a card. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying
Cycling {U} ({U}, Discard this card: Draw a card.)

When Slayer's Grimoire enters, exile target non-Human creature an opponent controls until Slayer's Grimoire leaves the battlefield.
{2}{W}, {T}: You gain 2 life.

You may reveal a creature card with flying you own from outside the game and put it into your hand. Exile Snag Apparition.

Solemn Bastion enters tapped. When it enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
{T}: Add {W} or {B}.

Somber Meadow enters tapped.
{T}: Add {W} or {B}.
{1}, {T}: Add one mana of any color.

Whenever another creature you control enters, target opponent loses 1 life and you gain 1 life.
Sacrifice Somber River Bearer: Creatures you control gain indestructible until end of turn.

Somberwald Rider can't be blocked by creatures with power 2 or less.
{2}{G}: Transform Somberwald Rider. Activate only if it's attacking.

Somberwald Slaughterer can't be blocked by creatures with power 2 or less.
At the beginning of your end step, if Somberwald Slaughterer didn't attack this turn, transform it.

[+1]: Draw a card. Each player loses 1 life.
[–2]: Create two 1/1 black Bat creature tokens with flying and lifelink.
[–3]: Target creature gets -13/-13 until end of turn. You control abilities of that creature that trigger this turn.

When Soul-Capturing Lantern enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
{1}, {T}: Add one mana of any color.
{6}, {T}, Sacrifice Soul-Capturing Lantern: Exile target nonland permanent. Activate only as a sorcery.

Flying
When Spawn of Keranos enters, you may draw a card. If you do, discard a card unless you control another creature with flying.

Spectral Salvo deals 13 damage to target tapped creature. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Flying
If a nonland permanent an opponent controls would be returned to its owner's hand, instead gain control of it for as long as you control Sphinx Paramount.

Counter target spell. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Choose one —
• Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
• Tap target creature and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Gain control of target creature until end of turn. Untap it. Until end of turn, it gets -1/-1 and gains haste.

Spinerock Canyon enters tapped unless you control a basic land.
{T}: Add {R} or {W}.

{T}: Add {G}, {W}, or {U}.
Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add {W}, {U} or {B}.
Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add {U}, {B}, or {R}.
Cycling {2} ({2}, Discard this card: Draw a card.)