Thoughtrender Lamia

Constellation — Whenever Thoughtrender Lamia or another enchantment enters the battlefield under your control, each opponent discards a card.

Odunos River Trawler

When Odunos River Trawler enters the battlefield, return target enchantment creature card from your graveyard to your hand.
{W}, Sacrifice Odunos River Trawler: Return target enchantment creature card from your graveyard to your hand.

Plains

Pharika's Chosen

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Brain Maggot

When Brain Maggot enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card until Brain Maggot leaves the battlefield.

Font of Vigor

{2}{W}, Sacrifice Font of Vigor: You gain 7 life.

Grim Guardian

Constellation — Whenever Grim Guardian or another enchantment enters the battlefield under your control, each opponent loses 1 life.

Harvestguard Alseids

Constellation — Whenever Harvestguard Alseids or another enchantment enters the battlefield under your control, prevent all damage that would be dealt to target creature this turn.

Doomwake Giant

Constellation — Whenever Doomwake Giant or another enchantment enters the battlefield under your control, creatures your opponents control get -1/-1 until end of turn.

Nyx Infusion

Enchant creature
Enchanted creature gets +2/+2 as long as it's an enchantment. Otherwise, it gets -2/-2.

Armament of Nyx

Enchant creature
Enchanted creature has double strike as long as it's an enchantment. Otherwise, prevent all damage that would be dealt by enchanted creature. (A creature with double strike deals both first-strike and regular combat damage.)

Nyx-Fleece Ram

At the beginning of your upkeep, you gain 1 life.

Swamp

Rotted Hulk

Oppressive Rays

Enchant creature
Enchanted creature can't attack or block unless its controller pays {3}.
Activated abilities of enchanted creature cost {3} more to activate.

Banishing Light

When Banishing Light enters the battlefield, exile target nonland permanent an opponent controls until Banishing Light leaves the battlefield.

Dreadbringer Lampads

Constellation — Whenever Dreadbringer Lampads or another enchantment enters the battlefield under your control, target creature gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Archetype of Finality

Creatures you control have deathtouch.
Creatures your opponents control lose deathtouch and can't have or gain deathtouch.

Archetype of Courage

Creatures you control have first strike.
Creatures your opponents control lose first strike and can't have or gain first strike.

Underworld Coinsmith

Constellation — Whenever Underworld Coinsmith or another enchantment enters the battlefield under your control, you gain 1 life.
{W}{B}, Pay 1 life: Each opponent loses 1 life.

Fate Unraveler

Whenever an opponent draws a card, Fate Unraveler deals 1 damage to that player.

Eagle of the Watch

Cast into Darkness

Enchant creature
Enchanted creature gets -2/-0 and can't block.

Akroan Mastiff

Font of Return

{3}{B}, Sacrifice Font of Return: Return up to three target creature cards from your graveyard to your hand.

Aspect of Gorgon

Enchant creature
Enchanted creature gets +1/+3 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy it.)