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I felt slightly surprised when I saw "x thing spirit summon" so I decided to ask the Guider Spirit because I seemed incapable of reading the complete descriptions of the skills I had yet to buy, it only said the most basic of things.
"Indeed, much like your Farmer Class is capable of bringing Farming Spirits now, these other Classes are also supposed to have something similar, the Novice Of All Trades Subclass is an upgrade of Jack of All Trades, so it has a bit of everything." Said the Guider Spirit.
Check "The Protagnist's Sister Is Actually the Strongest"!