Theros

Gift of Immortality | Enchantment | Aura | Enchant creature When enchanted creature dies, return that card to the battlefield under its owner's control. Return Gift of Immortality to the battlefield attached to that creature at the beginning of the next end step. | Matt Stewart

Observant Alseid | Enchantment Creature | Nymph | Bestow {4}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Vigilance Enchanted creature gets +2/+2 and has vigilance. | Todd Lockwood

Spear of Heliod | Legendary Enchantment Artifact | | Creatures you control get +1/+1. {1}{W}{W}, {T}: Destroy target creature that dealt damage to you this turn. | Yeong-Hao Han

Nimbus Naiad | Enchantment Creature | Nymph | Bestow {4}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Flying Enchanted creature gets +2/+2 and has flying. | David Palumbo

Thassa, God of the Sea | Legendary Enchantment Creature | God | Indestructible As long as your devotion to blue is less than five, Thassa isn't a creature. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) At the beginning of your upkeep, scry 1. {1}{U}: Target creature you control can't be blocked this turn. | Jason Chan

Nighthowler | Enchantment Creature | Horror | Bestow {2}{B}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Nighthowler and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards. | Nils Hamm

Hammer of Purphoros | Legendary Enchantment Artifact | | Creatures you control have haste. {2}{R}, {T}, Sacrifice a land: Create a 3/3 colorless Golem enchantment artifact creature token. | Yeong-Hao Han

Spearpoint Oread | Enchantment Creature | Nymph | Bestow {5}{R} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) First strike Enchanted creature gets +2/+2 and has first strike. | Todd Lockwood

Boon Satyr | Enchantment Creature | Satyr | Flash Bestow {3}{G}{G} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Enchanted creature gets +4/+2. | Wesley Burt

Bow of Nylea | Legendary Enchantment Artifact | | Attacking creatures you control have deathtouch. {1}{G}, {T}: Choose one — • Put a +1/+1 counter on target creature. • Bow of Nylea deals 2 damage to target creature with flying. • You gain 3 life. • Put up to four target cards from your graveyard on the bottom of your library in any order. | Yeong-Hao Han

Feral Invocation | Enchantment | Aura | Flash (You may cast this spell any time you could cast an instant.) Enchant creature Enchanted creature gets +2/+2. | Mathias Kollros