Champions Compendium

Choose a class out of 5 options upon joining the world.

Knight: Good damage and defense, but lacks mobility.
Brute: Creates and exploits enemy weakness.
Ranger: Fights efficiently from a distance, and can easily create distance.
Mage: Uses magic to support allies and oneself and does high damage.
Assassin: Quick and tricky, but also quite squishy!

There is also a block crafted with a nether star that allows class switching without losing unlocked skills.