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Little Root had several interesting Skills I had never seen before to be honest. I guess those are unique to a Treant! Seed of Calamity though… seems like a passive that boost his earned EXP and stat growth. Pretty handy so he can grow quickly. He got Physical and Magical Resistance right away, and even status effect resistance.
Then Uproot is the ability to uproot himself and walk in two legs. Rest allows him to… rest? If he goes to sleep, his HP and MP recovery are increased by x2, seems to increase with every level. Wooden Needle is the offensive Skill, it allows him to shoot needles made of wood that deal physical damage.