Rhox Faithwalker

Radiance - Other creatures you control that share a color with Rhox Faithwalker get
+X/+X where X is the amount of life you gained this turn.
Purity Seal {1}{w} (At the beginning of your upkeep, if you control 5 or more permanents, you
may pay {1}{w}. If you do, draw a card and you gain 1 life.)