The objective of Spell Duelist is to use spells to defeat each opponent.
Counter Spell: Press arrow key corresponding to the arrow indicated on the screen. Cast Spell: Counter a spell with a star attached, then press the spacebar to cast a spell.
This is a reflex-based game. It will take a lot of practice to be able to beat some of the stronger opponents. When you counter a spell with a star attached to it, immediately press the spacebar to cast a spell. The faster you defeat your opponent, the less likely it is you'll die.