4 Basic Natural Summons:
-Water
-Earth/mineral
-Fire
-Air

Specialties:
-Wind
-Light
-Sound
-Ice
-Electric
-Plant
-Paranormal/spirits
-Blood/bone
-Metal

Others:
-Celestial Summons: Highest power of summoning. Originating in Heaven; practiced by sanctified individuals. Combining the powers of Heaven and Earth to form great, invincible summons. Requires massive amounts of energy, control and concentration.
-Combination Summons: Combining Dark and Natural summons to produce a new class of power. Performed only by skilled, specialized summoners. Can be mixed with Specialties as well.

Dark Summon vs. Natural
-Dark Summon is characterized by the black aura resonating from anything that is summoned. Dark also possesses and evil factor which affects the mentality of any being it touches.
-Natural Summon is purely elemental. Each summon, however, is affected by the area in which it is summoned. Depending on the dominating elemental factor of the area the summon may be greater or weaker.