msem-instigator

Exile target enchantment or Equipment.

First strike
Effigy of Creation gets +1/+1 as long as your fealty to Mountains is four or greater. (Each Mountain you control counts towards your fealty to Mountains.)

Menace
Effigy of Destiny gets +1/+1 as long as your fealty to Swamps is four or greater. (Each Swamp you control counts towards your fealty to Swamps.)

Trample
Effigy of Harvest gets +1/+1 as long as your fealty to Forests is four or greater. (Each Forest you control counts towards your fealty to Forests.)

{T}: Add one mana of any color. Put a creation counter on Effigy of Ivory Fire.
{2}: Effigy of Ivory Fire becomes a 4/4 red Dragon artifact creature with flying until end of turn. Activate only if Effigy of Ivory Fire has three or more creation counters on it.

Lifelink
Effigy of Morality gets +1/+1 as long as your fealty to Plains is four or greater. (Each Plains you control counts towards your fealty to Plains.)

Flying
Effigy of Wisdom gets +1/+1 as long as your fealty to Islands is four or greater. (Each Island you control counts towards your fealty to Islands.)

Enchant noncreature permanent
Enchanted permanent is a colorless Forest land. (It has “{T}: Add {G}.”)

Haste
When Efreetspeaker dies, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

For each color of mana spent to cast this spell, create a 0/2 green Egg creature token. (Then exile this card. You may cast the creature later from exile.)

{T}: Add {W} or {B}. You lose 1 life unless you have less life than an opponent.

Your opponents can't gain life.
Whenever you cast a noncreature spell, put a +1/+1 counter on Eidolon of the Arena.

When Eighth-Life Companion enters, put two +1/+1 counters on target creature you control.
Recite {1}{W} (You may cast this from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave.)
Revive {2}{W}{W} ({2}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Whenever another creature you control enters, target instant or sorcery card in your graveyard with mana value less than or equal to that creature's power gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

When Ekebram's Scribe enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Elaborate Firecannon doesn't untap during your untap step.
{4}, {T}: Elaborate Firecannon deals 2 damage to any target.
At the beginning of your upkeep, you may discard a card. If you do, untap Elaborate Firecannon.

Exile target permanent, then return that card to the battlefield under its owner's control.

When Elder Prophesier enters, look at the top five cards of your library. You may reveal a Curse card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Flying
When Elder Roc enters, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)

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

Equipped creature gets +2/+0.
Whenever a creature blocks equipped creature, you may sacrifice Elderbane Rifle. If you do, destroy that creature.
Equip {2}

At the beginning of each combat, you may have Elderin, Crystalline Crusader become a copy of another target creature you control with mana value 3 or less until end of turn, except its name is still Elderin, Crystalline Crusader, it's still 3/3, still legendary, and it's an artifact in addition to its other types.
{W}{U}{B}{R}{G}: Elderin gets +3/+3 until end of turn.

When Elderthrone Castellan enters, you may search your library for a Plains card, reveal it, put it into your hand, then shuffle.

{T}: Add one mana of any color.
{T}, Sacrifice Elderthrone Shard: Draw a card.

Primal {U} (During your turn, you may cast this spell for {U} instead of playing a land.)
Counter target spell.