If you are at level 4 you would learn drill shot which is element neutral but in later levels you learn a move that deals fire elemental damage, light elemental damage, you learn a spell that inflicts the held debuff, you learn a spell that deals water elemental damage and applies chatter (chip damage debuff), Another spell that deals what I call "true damage" (A common event handles the damage output and ignores all resistances), And then the final spell a unicorn learns through levelling applies burn and fire elemental damage. Energy is the main elemental output of Unicorns (Earth Ponies primarily deal earth element damage and Pegasi Wind) but generally the spread of elemental damage is more broad for a Unicorn than other classes who are usually stuck with one element for better or worse.