Earth, fire, wind, water, heart… and some others. These are the classic elements of old (and also how you summon Captain Planet, but that’s beside the point). If you’re looking to add these to your games of D&D more than they already are, you can check out Elementara, a new setting guide and RPG supplement that’s up on Kickstarter now.
From the campaign:
The campaign is up and over its funding goal with 25 days left to go.