Armament of Nyx | Enchantment | Aura | 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.) | Slawomir Maniak
Harvestguard Alseids | Enchantment Creature | Nymph | 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. | Igor Kieryluk
Aspect of Gorgon | Enchantment | Aura | Enchant creature
Enchanted creature gets +1/+3 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy it.) | Willian Murai
Grim Guardian | Enchantment Creature | Zombie | Constellation — Whenever Grim Guardian or another enchantment enters the battlefield under your control, each opponent loses 1 life. | Ryan Barger
Nyx Infusion | Enchantment | Aura | Enchant creature
Enchanted creature gets +2/+2 as long as it's an enchantment. Otherwise, it gets -2/-2. | Jason A. Engle
Oakheart Dryads | Enchantment Creature | Nymph Dryad | Constellation — Whenever Oakheart Dryads or another enchantment enters the battlefield under your control, target creature gets +1/+1 until end of turn. | Johann Bodin