All sprites, tiles, props, spell effects and icons are from CraftPix.net, used under the CraftPix licence:
Top-down mage characters (Mage packs 4–6 and 7–9)
Monster sprites: Slime, Mushroom, Gnoll, Skeleton, Ghost, Vampire, Beholder, Orc, Ent and Golem packs
Top-Down Pixel Lich Character Sprites, Top-Down Graveyard Monsters, Top-Down Pixel Art Slime Monsters, Swamp Enemies Top-Down, Top-Down Wild Animals and the Goblin Character Sprite Pack
Tilesets and props: Forest, Ruined Temple and Undead
Magic spell effect packs and Fire Magic Effects
Skill icon packs, including summoning, Necromancer, Cryomancer, Aeromancer and Druid skill icons