msem-instigator

[progress 2+]
[progress 5+]
Whenever a creature enters, each opponent loses 1 life.

Electrical Eradication deals 3 damage to each nonlegendary creature. Then if you controlled a red legendary creature or planeswalker as you cast this spell, it deals 3 damage to each nonlegendary creature and each opponent.

Electrokinetic's Bolt deals 3 damage to target creature or planeswalker.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, Electrokinetic's Bolt deals 3 damage to that permanent's controller.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, you may have Elegant Fireslinger deal 1 damage to target creature.

Elegant Strike deals 2 damage to target tapped creature. Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Elemental Envelopment enters with X +1/+1 counters on it.
When Elemental Envelopment enters, if you controlled a green legendary creature or planeswalker as you cast it, search your library for any number of Elemental creature cards with total mana value X or less, where X is Elemental Envelopment's power, put them onto the battlefield, then shuffle.

{T}: Add {C} and one mana of any color.

When Elemental Loremaster enters, return an instant or sorcery card at random from your graveyard to your hand.

Target creature gets +X/+X until end of turn, where X is 3 plus the number of cards named Elemental Power in your graveyard.

Flash
Creatures you control that have entered this turn get +1/+1 and have haste and first strike.

Reach
Whenever Elemental of Vengeance is dealt damage, it deals damage equal to its power to any target.

Equipped creature gets +1/+1 and has prowess.
Equip {2}

Create three tapped colorless Powercell artifact tokens with “{T}: Add {C}.” Then untap all artifacts you control. At the beginning of the next end step, sacrifice three artifacts.

Choose one —
• Target creature you control deals damage equal to its power to another target creature or planeswalker.
• Target planeswalker you control deals damage equal to the number of loyalty counters on it to target creature or planeswalker.

At the beginning of combat on your turn, creatures you control gain your choice of trample, menace, haste, or +1/+0 until end of turn.

{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into their owner's library.

During each of your turns, you may cast a card with a cycling ability from your graveyard by discarding a card in addition to paying its other costs. If that spell would be put into your graveyard, exile it instead.
Cycling {2} ({2}, Discard this card: Draw a card.)

Elrayin, the Manaroot enters tapped.
Whenever you tap another land for mana, put a creation counter on Elrayin.
{T}, Remove ten creation counters from Elrayin and sacrifice it: Untap all lands target player controls.

{1}, {T}: Exile target creature you control until Elsewhere Mirror leaves the battlefield. (It returns to the battlefield under its owner's control.)
{3}: Choose a permanent card exiled with Elsewhere Mirror. Target creature becomes a copy of that card until end of turn.

Hexproof, reach

When Elven Guard becomes the target of a spell you control, you may pay {G}. If you do, transform it.

(Transform this if it's not attached to a creature. Pay {3}{G} as a sorcery to unattach it.)
Enchant creature you control
Elven Mount's rider gets +3/+3 and has trample.

At the beginning of combat on your turn, look at the top card of your library. You may reveal it. If you do, target creature gets +X/+X until end of turn, where X is the revealed card's mana value.

{4}{G}, Sacrifice Elvish Godtracker: Create a 5/5 green Beast creature token.