-Elements: Fire, Water/Ice (Ice is an offshoot of Water), Earth/Metal (Metal is an offshoot of Earth), Luster (Light), Umbra (Dark), Arcane (non-elemental, pure mana), Wind/Lightning (Lightning is an offshoot of Wind)
-Magi Technology is the sort of technology used in this world. Basically, all machinery is utilizes runes and other forms of magic.
-Dogs aren't the only creatures used as guards. Anything from Golems, Gargoyles, and more are used. Sometimes Shapeshifters are forced to become guards for wealthy home owners.
-Hell portals are scattered all over planet. Said portals are "dead zones", there is no life in these areas and they are uncomfortably cold. Some of them are whirlpools in the ocean. Main portal to Hell would be a barren wasteland and the site of a major war.