msem-instigator

{1}: Look at the top card of your library.
{G}, {T}, Mill a card: Untap another target creature.

Elfcycling {2}{G} ({2}{G}, Discard this card: Search your library for an Elf card, reveal it, and put it into your hand, then shuffle.)

Whenever Elvish Wayfinder enters or attacks, reveal the top four cards of your library. You may put a land card that doesn't share a name with a land you control into your hand. Put the rest on the bottom of your library in any order.

Haste
At the beginning of your upkeep, sacrifice Ember of Ancient Infernos unless you pay {R}.

Prowess, haste
When Embercore Grazer enters, add {R}{R}{R}. Spend this mana only to cast instant and/or sorcery spells.

First strike
{1}{R}: Transform Embercut Duelist. Activate only if it's attacking.

Haste, prowess
{3}{R}, {T}, Sacrifice Emberheart Arcanist: Return target instant or sorcery card from your graveyard to your hand.

Colossal 2—{3}{R} (You may cast this for its colossal cost to have it enter with two +1/+1 counters; or pay {3}{R} as a sorcery: Put two +1/+1 counters on it if it has none.)
When Emberhound's colossal ability puts one or more counters on it, target creature can't block this turn.

Flash
When Emissary of Dark Tides enters, you may return target noncreature spell or tapped creature to its owner's hand.

Legendary creatures you control get +1/+1.

Flying
When Endmire Raven dies, each opponent loses 2 life and you gain 2 life.

{U}: If Engrossed Reader doesn't have flying, put a flying counter on it.
{1}{U}: If Engrossed Reader has flying, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on Engrossed Reader.
{1}{U}{U}: If Engrossed Reader has a +1/+1 counter on it, it becomes a copy of another target creature until end of turn.

First strike
When Engulfing Incubus enters, you may submerge target nontoken creature an opponent controls. When Engulfing Incubus is no longer on the battlefield, turn that card face up. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Double strike
Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)

Prowess

Whenever Ensnaring Possessor attacks, you may tap or untap target permanent.
{1}{U}, {T}: Until end of turn, target creature gets +1/+1 and gains “Whenever this creature attacks, you may tap or untap target permanent.” Activate only as a sorcery.

Whenever Ensouled Thief attacks, upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Prowess

Flying
Whenever Entali Aeromancer attacks, Elementals you control gain flying until end of turn.

Whenever you make first contact, Entelan Idealist gets +2/+2 until end of turn. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Whenever a Role is attached to a creature you control or you cast a spell that targets a creature you control, put a +1/+1 counter on Enthusiastic Admirer.

Whenever another creature dies, upgrade Entitled Griefer. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Deathtouch
• Lifelink

Haste
{W}, {T}: Tap target creature.

Flying
Once each turn, when an opponent draws a card while they have more cards in hand than you, you may draw a card.

Flying
When Ephara's Watcher enters, scry 2.

Flying, lifelink