The Alruna are a pair of new whip boots in Bayonetta 2. As the description implies, this weapon is equipped to Bayonetta's legs and also serve as a replacement for the Kulshedra whip from the first game.
The Alruna's unique trait is the ability to hit all enemies near Bayonetta in a 360 degree spin attack from both legs. The boots can also be used to grab enemies from afar and slam them into the ground like Kulshedra.
In Umbran Climax, the Alruna summon a new frog-like demon that uses it's spiked tongue like a whip in big sweeping arcs.
Trivia
Alruna is the name of a mandrake plant; this plant is said to scream when uprooted, a scream that kills anyone who hears it. This connection is further enforced by the vine motif that is apparent when the weapon is in used and during it's Wicked Weaves.
The Alruna were some of the first new weapons teased for Bayonetta 2 in the first development trailer shown in 2013.
