Lana

Lana Uzumaki is a sorceress you meet in Chapter 4. Her primary weapon is her Spell Book, a book containing over 999 spells that never expire. She only knows how to use 12 of the spells properly, so out of the 1000 spells in total, she knows 1.2% of the spells (yes I did the math you can add it up and get the answer I got). Her secondary weapon is the Plasma Beam. You unlock it after you defeat Skeletron. It has a blast powerful enough to split a boulder in half with ease and slice through 500 more.