msem-instigator

Target creature gets +2/+2 until end of turn. If you control four or more lands, that creature gets an additional +2/+2 until end of turn.

{T}: Add {G}.

{G}: Each player exiles a card from their graveyard. If an instant or sorcery card is exiled this way, put a +1/+1 counter on Earthfeeder Worm.
Remove X +1/+1 counters from Earthfeeder Worm and sacrifice it: Exile X target cards from graveyards.

Prowess
Vanishing 2 (This creature enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
{1}{W}: Target creature and all creatures with the same name as that creature get +0/+1 until end of turn.

First strike
Sacrifice Echo Striker: Target creature gains double strike until end of turn.

Target permanent and all other permanents with the same name as that permanent gain indestructible until end of turn.

Target creature and all creatures with the same name as that creature get +2/+1 and gain lifelink until end of turn.

Counter target spell and each other spell with the same name as that spell.

Destroy target artifact or enchantment and all other permanents with the same name as that permanent.

Echoing Thunder deals 3 damage to target creature and all other creatures with the same name as that creature.

As an instant or sorcery spell not cast from exile resolves, exile it instead of putting it anywhere else.
Once each turn, you may cast a card exiled with Eidetic Memory.

Whenever a nontoken creature you control dies, you may put a +1/+1 counter on target creature. If you do, that creature's controller loses 1 life.

{3}{G}: Elder Rootwallas gets +4/+2 until end of turn. Activate only once each turn.

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.

The next creature spell you cast this turn can be cast as though it had flash. When that creature enters this turn, it gains lifelink until end of turn.

Exile up to three instant or sorcery cards from your graveyard. You may cast a copy of each card exiled this way without paying its mana cost.

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.

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

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

Reverberate {1}{U} (When you cast this spell, copy it if you paid its reverberate cost. You may choose new targets for the copy.)
Until end of turn, target creature loses all abilities and becomes a blue Elemental with base power and toughness 3/3.

Exile target creature you control, then return that card to the battlefield under your control.

[+1]: Create a 1/1 white Warrior creature token.
[–1]: Another target permanent you control gains indestructible until your next turn.
[–8]: You get an emblem with “Creatures you control get +2/+2.” and “Prevent all damage that would be dealt to attacking creatures you control.”

If a permanent would deal damage to Elusive Fatecrafter, instead prevent that damage and exchange control of Elusive Fatecrafter and that permanent.