Flash
When Seal Away enters, exile target tapped creature an opponent controls until Seal Away leaves the battlefield.

Vigilance
When Seasoned Spymaster enters, teach target creature vigilance.

Exile all creatures you don't control. Then return those cards to the battlefield tapped under their owners' control unless you've cast another spell named Second Crown's Fall this game. Then exile Second Crown's Fall.

Seismic Brute can't be blocked by creatures with defender.

Vigilance
Whenever Selective Truthseeker or another nontoken creature you control enters, surveil 1. When you put a nonland card into your graveyard this way, you gain 1 life.

At the beginning of your end step, put a +1/+1 counter on each tapped creature you control.
{G}{W}{U}, Remove five counters from among creatures you control, Sacrifice Severin's Masterwork: Create Chaneryx, Perfect Lifeform, a legendary 10/10 green, white, and blue Leviathan creature token with ward {10}.

Flying, vigilance
{1}, Discard a card: Sharlate gains indestructible until end of turn.
Each spell an opponent casts costs {VP} more to cast for each other spell that player has cast this turn.

Whenever you activate an ability that targets Shiver Elemental, you may copy that ability. You may choose new targets for the copy.

Destroy target nonland permanent if it's a creature with power 4 or greater or if you've amped it up this turn.

At the beginning of your upkeep, create a 1/1 white Human creature token for each Shrine you control.

Exile target nonland permanent with mana value less than or equal to the amount of life you've lost this turn.

Double strike

Flying
Whenever Silversilk Emissary attacks, put a +1/+1 counter on another Advisor you control unless an opponent pays {2}.

When Skophos Warden enters, you may exile target artifact or enchantment an opponent controls until Skophos Warden leaves the battlefield.

Once each turn, when Smart Shopper enters or you cast a creature spell, create a Berry token. If three or more types of mana were spent to cast it, create three of those tokens instead.

Snoring Stone enters with two defender counters on it.
Landfall — Whenever a land you control enters, move a defender counter from Snoring Stone onto another target permanent.
When Snoring Stone attacks, transform it.

Create two 1/1 colorless Servo artifact creature tokens. Scry 1.

When Soothing Singer enters, exile target nonland permanent you don't control until Soothing Singer leaves the battlefield.
{1}{W}: Soothing Singer gets +0/+2 until end of turn.

Flying
Nonland permanents you control have phasing.
Whenever Spacetime Seraph phases out, until your next turn, your life total can't change and you have protection from everything.

Whenever Spear of the Sun-Crowned attacks, if you control two or more enchanted creatures, it gains lifelink until end of turn.

Whenever you amp it up, target creature gets +1/+1 until end of turn. If this is the second time this ability has resolved this turn, put a +1/+1 counter on that creature instead.

Flash
Enchant creature
Enchanted creature gets +2/+2.

When this creature transforms into Splintered Soul, create X 3/1 colorless Cyborg Soldier artifact creature tokens.
Whenever Splintered Soul or another Cyborg you control dies, you gain 1 life.

Landfall — Whenever a land you control enters, put a +1/+1 counter on Spore Collector. It gains your choice of vigilance, first strike, or lifelink until end of turn.

First strike
Landfall — Whenever a land you control enters, you may tap target creature.