msem-instigator

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

When Esiara, Skycaster's Infiltrator enters, exile target spell with mana value 4 or less.
{1}{U}{U}, Discard two cards: Exile Esiara, then return it to the battlefield under your control.
{2}{U}{U}, {T}, Exile Esiara: Until end of turn, you may play cards you don't own from exile.

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.)

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.

Counter target creature spell.

This spell costs {1} less to cast for each other card in your hand.
If you have fewer than seven cards in hand, draw cards equal to the difference.

This spell costs {1} less to cast for each artifact you control.
Choose two —
• Untap each artifact you control.
• Put a +1/+1 counter on each artifact creature you control.
• Draw a card.

Enchant creature
You control enchanted creature.

Enchant creature
Enchanted creature has erratic. (When that creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
When enchanted creature dies, return Eternal Recurrence to its owner's hand.

Flash
Flying

Whenever you draw your second card each turn, put a +1/+1 counter on Ethereal Sneak.

When Ethereal Spellmaster enters, if it was cast, you may search your library for an instant or sorcery card with mana value 3 or less and cast it without paying its mana cost. If you do, shuffle your library. (If it has X in its mana cost, X is 0.)

Defender
When Ethereal Threshold enters, if it was cast, exile target artifact or creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Embellish {6}{U} (If you cast this spell for {6}{U}, create a 1/1 blue Thopter artifact creature token with flying when it enters.)
Whenever you attack, return any number of nonland permanents with different controllers and mana value less than or equal to the number of artifacts you control to their owners' hands.

Artifact spells you cast cost {1} less to cast.

Vanishing 2 (This permanent 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.)
Whenever a time counter is removed from Evade the Authorities, you may return target creature to its owner's hand.

Put up to one target artifact, instant, or sorcery card from your graveyard on top of your library.
Investigate twice. (Create two colorless Clue artifact tokens with “{2}, Sacrifice this artifact: Draw a card.”)

Put a +1/+1 counter on target creature. That creature can't be blocked this turn.

Draw four cards.

This spell costs {1} less to cast for each tapped creature your opponents control.
{5}{U}: Evigian Titan can't be blocked this turn.

As Evil One's Mind Tricks enters choose Lafterii or Evil One.
• Lafterii — Wizards you control have “{3}{U}, {T}: Draw a card.”
• Evil One — Whenever a Zombie you control enters, target player mills two cards.

Scry 5.

{T}: Draw a card, then discard a card.
Whenever you cast an instant or sorcery spell, untap Exchange Scholar.

Counter target creature spell.
Draw a card.

Spells you cast from anywhere other than your hand can't be countered.
Whenever an opponent casts a spell with the same name as a card they own in exile or in their graveyard, you may draw a card.