msem-instigator

If a spell or ability would cause its controller to draw a card this turn, that player discards a card instead.
If a player would gain life this turn, that player loses that much life instead.

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.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
Creature tokens you control have lifelink.

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.

When Essence of Nurture enters, put a +1/+1 counter on another target creature, then you gain life equal to that creature's toughness.

Trial 4 (As you cast this spell, an opponent of your choice may pay 4 life. If they don't, they fail the trial.)
You draw two cards and you lose 2 life. Target player discards two cards if they failed the trial.

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.

When Establish Guard enters or leaves the battlefield, create a 1/1 white Human Soldier creature token and you gain 1 life.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

When Etched Longspear enters, attach it to target creature you control.
Equipped creature gets +2/+0.
Equip {3}

{T}: Put target permanent you own on the bottom of your library.
{1}, {T}: Add one mana of any color. When that mana is spent, target opponent loses 1 life.

Enchant creature
When Eternal Banishment enters, put a +1/+1 counter on enchanted creature.
Remove a +1/+1 counter from enchanted creature: Exile target creature an opponent controls until Eternal Banishment leaves the battlefield. Activate only as a sorcery.

Return X target cards with different mana costs from your graveyard to your hand. Exile Eternal Blessings.

Enchant player
At the beginning of enchanted player's upkeep, their life total becomes 10.

Eternal Duneborn enters tapped.
Foresight — Whenever you draw your second card each turn, return Eternal Duneborn from your graveyard to your hand.

Put a -1/-1 counter on target creature.
Draw a card.

When Eternal Inheritance enters or at the beginning of your upkeep, if you control no Samurai, create a 1/1 colorless Samurai creature token, then you may attach Eternal Inheritance to it.
Equipped creature gets +1/+1.
Equip {1}

Return up to two target creature cards with total mana value 3 or less from your graveyard to the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

All creatures get -2/-1.

Lifelink
Revive {5}{B}{B} ({5}{B}{B}, 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.)

Eternal Oak gets +1/+1 for each creature you control.
Whenever a nontoken creature you control dies, create a 1/1 green Saproling creature token.

Once each turn, you may activate an additional loyalty ability of a planeswalker you control any time you could cast an instant.

Enchant creature
Enchanted creature has vigilance.
When enchanted creature deals combat damage to a player, return Eternal Path to its owner's hand.