Arcanotech Armor

This impossibly intricate and huge sized suit of plate armor looks like a fusion of technologically advanced plate armor with arcane sigils and glyphs, its metallic plates etched with glowing runes. It was designed by Eronian doctors and engineers, under the direction of Connor Lockwood, to provide protection in times of war. Despite being full plate, the armor bends and flows like silk due to it synchronizing with the users mind, if it smart enough. Whisper-thin conduits of raw mana surge across the joints, amplifying both movement, strength, and spellcasting.

While attuned to this armor, you can summon it and don it on or off with an action, as long as you have space, by sacrificing your highest available spell slot. You become one size larger, to a limit of huge, and you gain proficiency with heavy armor while wearing it. Your AC becomes 10+Proficiency Bonus+Intelligence Modifier while inside the armor, and strength ability checks, skill checks, and attacks use Intelligence modifier instead. It's size does have a drawback, reducing your dexterity score to 8. After wearing it for 6 hours, you must take it off and take a short or long rest before you can don it back on again.

Mana Amplifier. On the right forearm is equipped a rotating cannon to fire spells and a gem on the hand to amplify them. While wearing this armor you can use it as a casting focus. Once per turn, when rolling dice for damage or healing spells, you can add your intelligence modifier to the roll.

Mana Ward Projector. On the left forearm can be placed a shield. Whenever you are subjected to a Dexterity saving throw for damage, you can expend a spell slot of fourth level or higher as a reaction to take only half damage. Alternatively, you can expend a spell slot of 7th level or higher as a reaction to pass it.

Mana Converter. During combat, the armor boosts your physical abilities reliant on your spellcasting ability as a bonus action for 5 minutes. The armor works in areas of antimagic if you have proficiency in computers. Your speed doubles, and you gain a flying speed equal to your walking speed. You have advantage on Concentration checks and saving throws for spells and other magical effects. You can attack twice, instead of once, per attack action. When the duration ends you suffer two levels of exhaustion as the armor vents raw mana.

Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.

Notes: a humanoid creature with 20 base Intelligence, Str. 15 Required, Stealth Disadvantage