The fighting style, “Two Weapon Fighting”, allows adding STR to the off-hand, but barbarians do not get this fighting style. You may only attack once with the off-hand.
Do barbarians have unarmored defense?
Yes, a barbarian could potentially lose AC when their unarmored defence is better than their AC from their armor, because unarmored defence has an explicit caveat that says “When you are not wearing armor”. If you are wearing armor, you do not get unarmed defence (because, well, you’re not unarmored after all).
How many times can you rage as a barbarian?
Once you have raged the maximum number of times for your Barbarian level, you must finish a Long Rest before you can rage again. You may rage 2 times at 1st level, 3 at 3rd, 4 at 6th, 5 at 12th, and 6 at 17th.
Can you use a shield in barbarian unarmored defense?
Beginning at 1st level, while you are wearing no armor and not wielding a shield… and in the Barbarian Unarmored Defense. While you are not wearing any armor, your Armor Class equals 10 + your Dexterity modifier + your Constitution modifier. You can use a shield and still gain this benefit.
Can a barbarian cast a spell while raging?
There is nothing saying that a Barbarian cannot pre-cast a duration spell that has a lasting effect which does not require concentration. It simply says you cannot cast and/or concentrate on a spell while Raging. That said you are going to find that your idea is severely lacking. Possible pre-cast non-concentration spells:
How long does a Barbarian Rage last in D & D?
• You have Resistance to bludgeoning, piercing, and slashing damage. If you are able to cast Spells, you can’t cast them or concentrate on them while raging. Your rage lasts for 1 minute. It ends early if you are knocked Unconscious or if Your Turn ends and you haven’t attacked a Hostile creature since your last turn or taken damage since then.
