Decree of Conviction

Creatures you control are white in addition to
their other types, get +1/+3, and gain lifelink.
Whenever you gain 4 or more life, search your
library for a basic land card, put it into your
hand, and shuffle your library.
At the beginning of your end step, create 4/4
white angel creature token with flying. Tap it.
What is belief without action?