Deities

Deities are beings that loom over nearly all, they're usually worshiped by many, and are capable of amazing feats in all categories. However, this doesn't necessarily mean they're all-powerful, or all-knowing.
Nearly all deities are limited in scope to one dimension, either because they created it, or they're powerful enough to be able to control it.

"As the world wove a spell together, a great Thunder rolled through, and Aer had finally fallen." - Excerpt, The Thunderclap

Deities are not inherently immortal, and can be killed in varying difficulty depending on the strength of the deity, as shown by the Thunderclap, among other events.