Luigi, Scaredy Ghost Buster

Whenever a non-spirit creature or planeswalker
dies, return it to the battlefield under its owner control. Creatures are 1/1 spirits in addition to
other types. Planeswalkers are spirits in addition
to other types and have a starting loyalty of 1.
Spirit creatures can attack their controller.
You control the actions of spirits. (Attacking, blocking, activating abilities, etc. Other player's still control the it, but you control what it does)