msem-instigator

Flying
Whenever Eta, Experimental Doctor attacks, you may exile target card from a graveyard. If a creature card was exiled this way, put a +1/+1 counter on Eta and you gain 2 life.

Lifelink
Whenever you draw your second card each turn, put a +1/+1 counter on Ethereal Runner.

Flying
When Ethereal Savior enters, you may return target creature card with mana value 2 or less from your graveyard to the battlefield.

Flying
Deploy 2 (As this enters, you may tap any number of other creatures you control with total power 2 or more.)
When Ethereal Shepherd enters deployed, exile target creature. That creature's controller creates a 1/1 white Spirit creature token with flying.

Whenever you draw your second card each turn, put a +1/+1 counter on Ethereal Sneak.

Artifact spells you cast cost {1} less to cast.

Stampede — Whenever Etlan High Priest and a creature with greater power attack, Etlan High Priest gets +1/+1 until end of turn. Then you gain 1 life and scry 1.

When Evanescier Greypelt enters, it fights target creature.
Mirage {3}{G} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Flying
Whenever Everember Phoenix deals combat damage to a player or planeswalker, you may put target exiled card you own or card in your graveyard that shares a name with it into your hand.
Revive {1}{R}{R} ({1}{R}{R}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate this ability only any time you could cast a sorcery.)

Flying, vigilance

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you gain life, you may pay {W}. If you do, transform Evigian Noble.

First strike
When Excavator of the Beyond enters, rediscover an artifact card. (Look at the top card of your library. You may reveal it and put it into your hand if it's an artifact card. Otherwise, put it back or into your graveyard.)

First strike, vigilance, lifelink

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
When Exiled Warband dies, draw a card.

Other Elves you control get +1/+1.
Whenever another Scout you control deals combat damage to a player, you may reveal the top card of your library. If it's a land card, put it onto the battlefield tapped.

When Expedition Outfitter enters, create a 1/1 colorless Servo artifact creature token.
At the beginning of each end step, if an artifact was put into your graveyard from the battlefield this turn, Expedition Outfitter deals 1 damage to each opponent.

When Expensive Tutor enters, tap target land. It doesn't untap during its controller's next untap step.

When Experienced Team enters, choose one —
• Create a 4/2 white Bear creature token.
• Create a 2/4 red Snail creature token.
• Create a 2/2 white Bird creature token with flying.

When Exquisite Artisan enters, judge target noncreature artifact you control. If you honor it, it becomes a 0/0 Construct artifact creature with flying. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

Art of war — At the beginning of your end step, if Exultant Oni dealt damage to an opponent this turn, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

When Eyes of the Maghbri enters, if you control a creature token, create a 2/2 black Hound creature token.

Other creatures get -1/-1.
Recite {1}{B} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

Lifelink, haste
At the beginning of your end step, Fae-Frill Fox deals X damage to target player, where X is the number of times you gained life this turn.

Other Elemental creatures you control get +1/+0.