Warlock (1980)

Warlock pits up to 6 wizards together in a magic duel. The players enter the arena and cast various spells on each other trying to banish their opponents into limbo permanently. Each player has a limited amount of energy to cast offensive or defensive spells. It also costs energy to return from limbo if your wizard gets sent there for not defending against an attack. Once your energy reserves are depleted and you're banished to limbo you stay there and the remaining wizards battle until there is only one left. You may play either a black or white wizard, with your alignment affecting the casting cost of any particular spell. Each player keeps a reference chart in front of them to track the status of their wizard and compare spell effects. In the end....."There can be only one".