Akroan Line Breaker

Battlefield Thaumaturge

Creature — Human Wizard (2/1)

Each instant and sorcery spell you cast costs less to cast for each creature it targets.
Heroic — Whenever you cast a spell that targets Battlefield Thaumaturge, Battlefield Thaumaturge gains hexproof until end of turn.

Sage of Hours

Creature — Human Wizard (1/1)

Heroic — Whenever you cast a spell that targets Sage of Hours, put a +1/+1 counter on it.
Remove all +1/+1 counters from Sage of Hours: For each five counters removed this way, take an extra turn after this one.

Tethmos High Priest

Creature — Cat Cleric (2/3)

Heroic — Whenever you cast a spell that targets Tethmos High Priest, return target creature card with mana value 2 or less from your graveyard to the battlefield.

Triton Cavalry

Creature — Merfolk Soldier (2/4)

Heroic — Whenever you cast a spell that targets Triton Cavalry, you may return target enchantment to its owner's hand.

Bloodcrazed Hoplite

Creature — Human Soldier (2/1)

Heroic — Whenever you cast a spell that targets Bloodcrazed Hoplite, put a +1/+1 counter on it.
Whenever a +1/+1 counter is put on Bloodcrazed Hoplite, remove a +1/+1 counter from target creature an opponent controls.

Dawnbringer Charioteers

Creature — Human Soldier (2/4)

Flying, lifelink
Heroic — Whenever you cast a spell that targets Dawnbringer Charioteers, put a +1/+1 counter on Dawnbringer Charioteers.

Leonin Iconoclast

Creature — Cat Monk (3/2)

Heroic — Whenever you cast a spell that targets Leonin Iconoclast, destroy target enchantment creature an opponent controls.

Satyr Hoplite

Creature — Satyr Soldier (1/1)

Heroic — Whenever you cast a spell that targets Satyr Hoplite, put a +1/+1 counter on Satyr Hoplite.

War-Wing Siren

Creature — Siren Soldier (1/3)

Flying
Heroic — Whenever you cast a spell that targets War-Wing Siren, put a +1/+1 counter on War-Wing Siren.

Mogis's Warhound

Enchantment Creature — Dog (2/2)

Bestow (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.)
Mogis's Warhound attacks each combat if able.
Enchanted creature gets +2/+2 and attacks each combat if able.

Eidolon of the Great Revel

Enchantment Creature — Spirit (2/2)

Whenever a player casts a spell with mana value 3 or less, Eidolon of the Great Revel deals 2 damage to that player.

Prophetic Flamespeaker

Creature — Human Shaman (1/3)

Double strike, trample
Whenever Prophetic Flamespeaker deals combat damage to a player, exile the top card of your library. You may play it this turn.

Stormchaser Chimera

Creature — Chimera (2/3)

Flying
: Scry 1, then reveal the top card of your library. Stormchaser Chimera gets +X/+0 until end of turn, where X is that card's mana value. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Bladetusk Boar

Creature — Boar (3/2)

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Forgeborn Oreads

Enchantment Creature — Nymph (4/2)

Constellation — Whenever Forgeborn Oreads or another enchantment enters the battlefield under your control, Forgeborn Oreads deals 1 damage to any target.

Sigiled Skink

Creature — Lizard (2/1)

Whenever Sigiled Skink attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Lagonna-Band Trailblazer

Creature — Centaur Scout (0/4)

Heroic — Whenever you cast a spell that targets Lagonna-Band Trailblazer, put a +1/+1 counter on Lagonna-Band Trailblazer.

Pensive Minotaur

Creature — Minotaur Warrior (2/3)

Pheres-Band Thunderhoof

Creature — Centaur Warrior (3/4)

Heroic — Whenever you cast a spell that targets Pheres-Band Thunderhoof, put two +1/+1 counters on Pheres-Band Thunderhoof.

Oakheart Dryads

Enchantment Creature — Nymph Dryad (2/3)

Constellation — Whenever Oakheart Dryads or another enchantment enters the battlefield under your control, target creature gets +1/+1 until end of turn.