Champion's Armor

thick metal plates grow onto your skin, covering you in vaguely plate-like armor. for the duration, this counts a heavy armor, in which you are proficient. while wearing it, your armor class is 18, it does not impose a disadvantage on your stealth checks, and the wearer gains an advantage on all strength based attack rolls, saving throws, and checks. addtionally, if you sleep in this armor, it does not count as sleeping in heavy armor.

at higher levels. if you cast this spell using a spell slot of 6th, you can maintain concentration on it for 8 hours. if you cast this using a spell slots of 7th level, this does not require concentration. if you cast this using a spell slot of 9th level, it lasts for 48 hours.