Strange is the Sorcerer Supreme of Earth; he has unparalleled mastery of the mystic arts, which he uses to defend his reality from otherworldly threats; his primary magical patrons are a group of entities known as "the Vishanti." The Vishanti are a trinity of godly beings comprised of Agamotto, Hoggoth and Oshtur.
Later, research from the Vishanti library led Dr. Strange to tap into catastrophe magic by invoking a syzygy of all the planets, but this source of magic was limited and he ceased using it when the Vishanti once again allowed him to call on their power.
Strange also possesses numerous magical artifacts, including the famous all-seeing Eye of Agamotto, which is kept in the amulet he wears at his throat.
His brother William inherited his earldom, which could only pass to heirs-male, but his baronial titles - BaronStrange, Baron Mohun of Dunster and Baron Stanley - which could pass to females as well as males, fell into abeyance between the late Earl's three daughters and their heirs.
In 1628, the sixth earl's eldest son James was summoned to the House of Lords as BaronStrange by a writ of acceleration.
James, Lord Strange later succeeded to the earldom of Derby, and the earldom and barony remained united until the death of the ninth earl, when the title fell into abeyance again.