Scuttle Tank enters with a defender counter on it.

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

Scry 3, then reveal the top card of your library. If it's a creature card, put it into your hand.

As an additional cost to cast this spell, you may put a card from your hand on the bottom of your library. If you do, it costs {5} less to cast.
Searing Truthflame deals 5 damage to target creature or planeswalker.

Vigilance
When Seasoned Spymaster enters, teach target creature vigilance.

Lifelink
Whenever Secluded Gorgon dies, you may bless target creature.

Secluded Hangar enters tapped unless you control a basic non-Forest land.
{T}: Add {G}.
{2}, {T}: Put a +1/+1 counter on target creature that entered this turn.

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.

Flash
When Security Initiative enters, you may tap or untap target nonland permanent. Then draw a card.
An opponent controls three or more tapped nonland permanents.

Flying
Whenever Seeker Orbs becomes tapped, scry 1.

Whenever a basic land you control enters, put a +1/+1 counter on Seeker of New Horizons. If you control seven or more lands, bless that land.

Whenever a land you control enters, scry 1. If that land is a Ruin, scry 2 instead.

When Seer of the Aspirants enters, surveil 1.
Wander {2}{G}

Trample
When Seismic Chimera enters, bless target creature.

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.

Vigilance
{1}, {T}: Tap target creature.

Approval — When Senators' Chauffeur enters, return up to one target creature card with mana value less than or equal to the number of colors among permanents you control from your graveyard to the battlefield.

Vigilance
Whenever a creature you control with vigilance attacks, put a +1/+1 counter on that creature.

Whenever a nontoken creature you control dies, create a token that's a copy of it, except it's a Minion and has decayed.

Set Ablaze deals 2 damage to any target. You may discard up to two cards, then draw that many cards.

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}.

You may remove +1/+1 counters from creatures you control as though they were loyalty counters on Severin, Sparkmind to pay its loyalty costs.
[0]: Create a 0/0 colorless Robot artifact creature token with two +1/+1 counters on it.
[–2]: You may tap or untap each of up to three target permanents.
[–7]: If it isn't an extra turn, take an extra turn after this one.

When Shaman of Rime's Fury enters, create a 0/0 colorless Spirit creature token. Put a number of +1/+1 counters on that token equal to the total number of instant and/or sorcery cards you own in exile and in your graveyard.

Until end of turn, target creature you control gets +1/+1 for each different creature type among non-Coward creatures you control. All creatures able to block it this turn do so.

Solidarity
You may look at the top card of your library any time.
You may cast creature spells that have a creature type no creature you control does from the top of your library.