Theros

Dauntless Onslaught | Instant | | Up to two target creatures each get +2/+2 until end of turn. | Peter Mohrbacher

Fabled Hero | Creature | Human Soldier | Double strike Heroic — Whenever you cast a spell that targets Fabled Hero, put a +1/+1 counter on Fabled Hero. | Aaron Miller

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

Lagonna-Band Elder | Creature | Centaur Advisor | When Lagonna-Band Elder enters the battlefield, if you control an enchantment, you gain 3 life. | Min Yum

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

Ray of Dissolution | Instant | | Destroy target enchantment. You gain 3 life. | Terese Nielsen

Scholar of Athreos | Creature | Human Cleric | {2}{B}: Each opponent loses 1 life. You gain life equal to the life lost this way. | Cynthia Sheppard

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

Wingsteed Rider | Creature | Human Knight | Flying Heroic — Whenever you cast a spell that targets Wingsteed Rider, put a +1/+1 counter on Wingsteed Rider. | Cynthia Sheppard

Daxos of Meletis | Legendary Creature | Human Soldier | Daxos of Meletis can't be blocked by creatures with power 3 or greater. Whenever Daxos of Meletis deals combat damage to a player, exile the top card of that player's library. You gain life equal to that card's mana value. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell. | Karla Ortiz

Anax and Cymede | Legendary Creature | Human Soldier | First strike, vigilance Heroic — Whenever you cast a spell that targets Anax and Cymede, creatures you control get +1/+1 and gain trample until end of turn. | Willian Murai

Chronicler of Heroes | Creature | Centaur Wizard | When Chronicler of Heroes enters the battlefield, draw a card if you control a creature with a +1/+1 counter on it. | John Stanko