When a creature  of cr 1/2 or higher is  reduced to 0 hp by you. You may choose  one of the following  effects 

Regain ki points equal to  1/2 the cr of the creature rounded up(min 1point)

Regain sorcery points  equal  to 1/2 the cr of the creature rounded up (min 1 point)

Gain temporary hit points equal  to 2× the cr of the creature

Regain one use of a  non spell class feature or racial  feature  that would refresh  on a short  rest could  restore cr minimum 3.

Regain the use of a non spell class feature or racial feature  that would restore on a long rest cr minimum cr 5

Regain  a spellslot of a level lower then the cr of the creature (i.e. a creature of cr 2 could restore  a level 1 spellslot)