Heroes
Obtain the following soulstones to unlock the following heroes. The soulstones are only found in Elite mode. You must complete a stage in Normal mode before you can play the Elite mode version. Other heroes are only available through card draws or the Arena shop.
Warriors
Berserker Claw: Flame Wrath, Moon Howl, Terror Cove.
Blood Baroness: Card draws.
Dark Paladin: Card draws.
Earthshaker: Dark Forest, Boreal Forest, Death Lair.
Headless Horesman: Card draws.
Hecate: Nightwatch, Deathknell.
Hell Hound: Card draws.
King o' Bones: Watchtower, Infinity Road, Fire Forest.
Shadowraith: Shadows, Wraith Attack, Sardin Cliffs.
Valkyrie: Fierce Path, Stone Canyon, Mist Plateau.
Zweihander: Purchase from Arena shop.
Mages
Arcane Spirit: Thunderclap, Elementals, Blaze Altar.
Astral Child: Card draws.
Blazing Soul: Meteorolite, Fireg Laputa.
Blue Witch: World Forest, Doomstone, Wood Upland.
Byron the Black: The Abyss, Bloodmaul, Thorns Wall.
Djinni: Purchase from Arena shop.
Exorcist: Cold Blade, Ash Cave, Mist Town.
Guardian: Storms Altar, Dark Outpost, Mystic Fort.
Light Envoy: Card draws.
Lunar Priestess: Lok Bridge, Despair Cliffs.
Mermaid: The Barrens, Disaster Root, Fort Hall.
Nereida: Inverted Cliff, Arctic Furnace, Endless Sea.
Soul Slinger: Card draws.
Summoner: Foultusk Lair, Hammer Fold, Wind Forest.
Archers
Amazon Hunter: Assassinate, Fire Cage, Torrent Camp.
Astral Hunter: Accursed, Doom Citadel.
Demon Hunter: The Nightfall, Demon Cave, Arctic Domain.
Grimbow: Purchase from Arena shop.
Night Sentinel: Purchase from Arena shop.
Nightblade: Dragon Youth, Mist Valley, Arctic Beacon.
Snow Queen: Peace Zone, Titanhammer.