Sea of Thought

The Sea of Thought is a realm beyond the physical world. It's a place composed entirely of imagination and memory — terrifyingly full of possibilities. You visit the Sea of Thought when you dream. When you think. When you reminisce. When you invent. When you cast spells. Some minds are more suited to navigate these waters than others.

The Sea of Thought is known by many names. The "astral plane." The "dream world." The "realm of the mind." The "higher consciousness." It is limitless and dynamic. A talented mage, mystic, psychic, oracle, sage, or scholar might be capable of projecting their own mind into the Sea of Thought and leaving their own world for a spell. The twelve elements that combine to form the mortal world are also part of the Sea of Thought, except they are much more concentrated and pure.

All mana comes from the Sea of Thought. When a mage sleeps, he dreams, so he drinks from the water and replenishes his own well of mana.

When a mage casts a spell, he surrenders some amount of mana. Bound by the laws of the universe, an elemental is manifested to collect the mana, siphon power from the Sea of Thought, and activate the effects of the spell.