Raijin, God of Thunder

Indestructible, Flying, Fear
As long as you have 5 or less artifact permanents,
Raijin isn't a creature.
At the beginning of your second main phase, if
an equipped creature you control dealt combat
damage to a player this turn, Raijin deals X
damage to any target, where X is the number of
artifacts you control, then you gain X life.