Arnold

Arnold is a miniboss found in Marshlands. He is slow and uses the common rune attack - Vine Trap with 100% accuracy and huge range every 5 seconds, which deals 30 damage each hit and stuns the target for 2 seconds. At close range he uses a small area of effect attack which deals 65 damage with a cooldown of 2 seconds. After he goes under half of his HP, he goes into his second phase, where his head seperates from his body and both parts go after you. In his second phase his flying head shoots an unavoidable beam at you every 5 seconds, which does 10 damage. He has 1600 HP. He has a 50% chance to drop 4 to 6 runes, a 0.8% chance to drop Eternal Life and Nature's Call, and always drops 30 to 40 crystals upon being killed.

Fighting
Arnold's version of Vine Trap is unavoidable so it is recommended you use moves or items such as the Resistance Talisman (1500 crystals at the genesis pines shop) to avoid most of his stuns. If you cannot afford it I recommend making large enough distance between him and you before he uses the stun and catches up to you, since his close range attacks are very powerful. The way to make enough distance between him and you is to always run away from him, or in a wide circle around him, just far enough that you almost get hit. It is recommended you draw him to land instead of fighting him in the water, and that in his second phase you always focus on his body instead of his head. The passives I would recommend are the ones focused on defense, such as Metallic Skin or Nature's Presence. The items/weapons I would recommend are Eternal flame(for more burn/bleed damage), Resistance Talisman(stun resistance), and Clouds of Creation(for slowing/freezing). The loadout I would recommend is Root Emergence/Venomous Fangs, Glass Shards, Flaming Wave, Flaming Pillars. A more advanced loadout would be Ice Shards, Glass Shards, Flaming Wave, Infernal Burst/Flaming Pillars(Depends on if you use Eternal Flame or not). Loadouts provided by Xdod.