Crippling Witch Doctor in Borderlands 2: Sir Hammerlock vs. The Son of Crawmerax.
Witch Doctors can transform into a deadly tornado in Hammerlock's Game Hunt DLC in Borderlands 2

The Crippling Witch Doctor is a Witch Doctor in Borderlands 2.

Can fire a crippling beam at you which slows your movement speed by a lot.

They can also heal themselves but are stationary while doing so.

From: Sir Hammerlock's Big Game Hunt DLC and Sir Hammerlock vs. The Son of Crawmerax