Summoners have two class change paths: one is the Dimensional Summoner, and the other is the Contract Summoner.
For the former, it requires drawing a summoning array to teleport an army of summoned beasts from another dimension.
The strength of a Summoner depends on the number of summoned beasts, making it a type that overwhelms enemies with sheer numbers.
The operation is relatively simple and can be done without worrying about consumption.
