For some barbarians, the power behind their fury is drawn from another source. Through various circumstances, they're tied to some otherworldly being that gives them power the barbarian channels into their rage.

Pact Magic

When you reach 3rd level, your otherworldy patron has granted you the ability to cast spells. See chapter 10 of the Player's Handbook for the general rules of spellcasting and chapter 11 in the Player's Handbook for the Warlock spell list.

Cantrips. You learn two cantrips of your choice from the warlock spell list. You learn an additional warlock cantrip of your choice at 10th level.

Spell Slots. The Path of the Profane Spellcasting table shows how many spell slots you have. The table also shows what the level of those slots is; all of your spell slots are the same level.

To cast one of your warlock spells of 1st level or higher, you must expend a spell slot. You regain all expended spell slots when you finish a short or long rest.

For example, when you are 8th level, you have two 2nd-level spell slots. To cast the 1st-level spell witch bolt, you must spend one of those slots, and you cast it as a 2nd-level spell.

Spells Known of 1st Level and Higher. At 3rd level, you know two 1st-level spells of your choice from the warlock spell list.

The Spells Known column of the Path of the Profane table shows when you learn more warlock spells of your choice of 1st level and higher. A spell you choose must be of a level no higher than what’s shown in the table’s Slot Level column for your level. When you reach 11th level, for example, you learn a new warlock spell, which can be 1st, 2nd, or 3rd level.

Additionally, when you gain a level in this class and order, you can choose one of the warlock spells you know and replace is with another spell from the warlock spell list, which also must be of a level for which you have spell slots.

Spellcasting Ability. Charisma is your spellcasting ability for your warlock spells, so you use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw DC for a warlock spell you cast and when making an attack roll with one.