msem-instigator

{1}{U}, {T}: Draw a card, then discard a card.

{T}: Add {C}. Spend this mana only to cast an instant or sorcery spell.
Whenever you cast a glitched spell, scry 2.

Whenever you cast an instant or sorcery spell, upgrade Error Exploiter. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof

Prowess
Wizardcycling {1}{U} ({1}{U}, Discard this card: Search your library for a Wizard card, reveal it, and put it into your hand, then shuffle.)

Equipped creature gets +0/+2.
As long as equipped creature is a Wizard, it has “{T}: Scry 1.”
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Return target instant or sorcery card from your graveyard to your hand.

Erupting Territory enters tapped.
{T}: Add {B} or {R}.
{1}, {T}: Add one mana of any color.

Once each turn, when another creature is returned to your hand from the battlefield, you may put a +1/+1 counter on Esalia's Courser.
{1}{G}: Esalia's Courser gains trample and vigilance until end of turn.

When this creature enters, you return up to one target permanent card from your graveyard to your hand. If you don't, it seeks secrets. (Give it that Oath Aura. Fulfill it by attacking with it and two or more other creatures to draw a card.)

{T}, Sacrifice Escape Hatch: Return target creature you control to its owner's hand.

When Escaped Ooze enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
{3}{G}: Put a +1/+1 counter on Escaped Ooze.

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
When Escort Recruiter becomes renowned, look at the top three cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Escorted Rider gets +1/+1 as long as you control another creature with flying.

Flash
Flying
When this creature enters, it seeks valor. (Give it that Oath Aura. Fulfill it by it dealing combat damage to a player to create a 2/1 white Soldier token.)

Esoteric Egg is all colors.
{T}: Add one mana of any color.

Choose two or four —
• Search your library for a card, put it into your hand, then shuffle.
• Each player mills seven cards.
• You gain 1 life for each land card in your graveyard.
• Conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

Lionize {2}{B} ({2}{B}, Exile this card from your hand: Put a +1/+1 counter on target creature and it gains the following ability until end of turn. You may cast this card on a later turn from exile.)
Lifelink

Esper Shardseeker can't be blocked.
Plainscycling {1}, swampcycling {1} ({1}, Discard this card: Search your libary for a Plains or Swamp card, reveal it, put it into your hand, then shuffle.)

Whenever Essence Carver blocks or becomes blocked by a creature with toughness 4 or greater, Essence Carver gets +2/+2 until end of turn.

At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

Counter target creature spell unless its controller pays {3}.
Cycling {B} ({B}, Discard this card: Draw a card.)

Essence Manipulator enters with a +1/+1 counter on it.
At the beginning of combat on your turn, you may move a counter from target creature onto another target creature with the same controller.

Whenever Essence Rehabilitator perseveres, you may return target permanent card with mana value 2 or less from your graveyard to the battlefield. (A creature perseveres when it survives damage.)

Counter target creature spell.