If you’re going to incentivize using it, at least make it a fun button to press.
I love mechanics like unleash life, or surge of power for elemental, or soul of the forest for Rdruid. Mechanics that let you choose what spell you want to enhance next.
But unleash life is just a tedious button to press because the effects that it provides are just so mediocre. It feels bad to use and waste a global on.