Fully restores HP and casts NulAll on a character.
Drains [Fire/Cold/Lightning/Earth] attacks
Tetra Elemental is a battle item that restores all HP and grants NulFire, NulFrost, NulTide, and NulShock to one target. When 12 are used during customizing on a piece of armor, they give Curseproof. It can be stolen from Master Tonberry and Seymour Natus.
Tetra- is a numerical prefix that refers to four.
Classical elements typically refer to ancient concepts similar to the modern states of matter: earth (solid), water (liquid), air (gas) and fire (plasma). Classical elements are the simplest form of existence, of everything in existence. Many philosophies and worldviews believe in classical elements.