The wild elemental heart is a heart of elemental magics. It is the core of what an elemental will start to develop with time due to all the magics imbued into it. This core, that appears to most as being a crystal, changes erratically, with no rhyme or reason. It'll look like a beautiful blue opal, then a rough green emerald, to a gentle thin topaz, to a sharp red. Each color changes with the flows of the wild fey magics, so the person that utilizes it, will never know what it is about to summon. The Player that infuses their magics with this crystal, allowing it's content to form into their original form for a small time. They will be able to summon their own elemental depending on what spell slot they use to power the crystal. Roll a 1d4 to determine what type of elemental. Each morning, roll a 1d4, and on 4 the crystal will become powered to be able to be utilized. Each spell slot level number determined how many hours the elemental remains. In example, a 3rd level spell slot would summon the elemental for 3 hours. 

1. Air Elemental
2. Earth Elemental
3. Fire Elemental
4. Water Elemental

Notes: in proximity to fey magics for a short rest.