msem-instigator

Frozen Hinterlands enters tapped.
{T}: Add {W} or {B}.
{1}{W}{B}: Until end of turn, Shrouded Rooftops becomes a 3/3 white and black Illusion creature with with lifelink and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)

Vigilance
Shuye, Forever Watching's power and toughness are each equal to the number of noncreature permanents you don't control.

Draw three cards, then discard a card unless you've catalyzed three or more times this turn.

Revive {3}{B} ({3}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Prowess
{T}: Catalyze, then catalyze again. Activate only if Sigil Slinger's power is 5 or greater. (The next spell you cast this turn costs {2} less to cast.)

Whenever target creature deals combat damage to a player this turn, create a token that's a copy of it.

Create a 1/1 white Soldier creature token. Then put a +1/+1 counter on a creature you control.

Counter target spell unless its controller pays {1} and 3 life.

Mill three cards, then counter target spell unless its controller pays {X}, where X is the greatest mana value among cards milled this way.

Flash (You may cast this spell any time you could cast an instant.)
When Silk Crane Adept enters, target creature gains hexproof until end of turn.

Reach

First strike

Whenever Simian Striker attacks, it gets +3/+0 until end of turn.

As long as you are glorious, you may look at the top card of your library. (You are glorious as long as you have a glory counter.)

Destroy target creature. It can't be regenerated.

Target player reveals a number of cards from their hand equal to the number of creature cards in your graveyard. You choose one of them. That player discards that card.

At the beginning of each end step, if you gained life this turn, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Pay any amount of life. Look at twice that many cards from the top of your library and put one into your hand. Exile the rest.

Equipped creature gets +1/+0 and has menace.
Equip {2}

Counter target spell. If you control a Wizard, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Haste
Sixpod Sprinter can't be blocked except by creatures with flying or reach.

When Skeletal Shredwing enters, target creature can't block this turn.
Revive {5}{R} ({5}{R}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Sacrifice another creature: Put a +1/+1 counter on Skieryg Menace.

Skulking Claw can't be blocked by creatures with greater power.
Skulking Claw gets +1/+0 for each unblocked attacking creature you control.

Sky-High Spires enters tapped unless you have two or more opponents.
{T}: Add {W} or {U}.