msem-instigator

Double strike, menace
{R}{W}, Exile Picturesque Champion from your graveyard: Target creature you control gains double strike and menace until end of turn. Activate only as a sorcery.

Lifelink

Whenever you cast a red spell, target creature gets +1/+0 and gains haste until end of turn.

{B}, {T}, Sacrifice Planar Eulogist: Aetherize target creature card in a graveyard. (To aetherize, create a token that's a copy of it, then exile that token.)
{6}{B}: Aetherize target creature card in a graveyard.

Flying
Whenever Planetary Reconnoiterer attacks, target creature you control gains flying until end of turn.

First strike, haste
Whenever you cast an enchantment, instant, or sorcery spell, put a +1/+1 counter on Plasma Blader.
{2}{R}{R}, Sacrifice Plasma Blader: It deals damage equal to its power to any target.

{T}, Tap an untapped creature you control: You gain 2 life.

Whenever Playful Surveyor attacks, reveal the top card of your library. If that card shares a color with a permanent you control, you gain 2 life.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Trample

{T}: Plucky Pickpocket voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Plucky Pickpocket phases in, draw a card, then discard a card.

Deathtouch

{T}, Exile a land card from your hand, from your graveyard, or a land that you control: Add one mana of any color.

When Polgek Artisan enters, create an X/X colorless Juggernaut artifact creature token, where X is the number of artifacts and enchantments you control.

Whenever Polgek Songcrafter attacks, other attacking creatures you control get +1/+0 until end of turn. If you control five or more attacking creatures, choose up to one target creature the defending player controls. That creature can't block this turn.

When Political Opportunist enters, you may shuffle the cards from your hand into your library, then draw that many cards.

{2}{W}, Sacrifice Pompous Explorer: Destroy target artifact or enchantment.

Whenever Portal Inhibitor attacks, exile target nonland card from defending player's graveyard. Copy it. You may cast the copy. (You still pay its costs, including color. Copies of permanents enter as tokens.)

Flying
Play with the top card of your library revealed.
Spells cost {X} more to cast, where X is the mana value of the top card of your library.

Flying
Crumble {2}{U} (This enters with three time counters if you cast it for its crumble cost. At your upkeep, remove one. When you remove the last, sacrifice it and draw a card.)
Whenever you remove a time counter from Potato Chip Swan, create a token that's a copy of it.

Flying
Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)

Flash
Flying
When Powder Scatterer enters, exile target noncreature spell. Its controller draws a card.

When Powercell Engineer enters, create a tapped colorless Powercell artifact token with “{T}: Add {C}.”

First strike
Whenever a nontoken creature you control leaves the battlefield, you may pay {W}. If you do, create a 1/1 colorless Spirit creature token.

Flash
When Predatory Psion enters, switch target creature's power and toughness until end of turn.

Prowess, haste
Whenever you cast an instant or sorcery spell, you may shuffle the cards in your hand into your library, then draw that many cards.