Celestial Empowerment

When this card enters the field, enchant target paladin, cleric or knight you control. If the
enchanted creature leaves the field, destroy this
card. Whenever the enchanted creature attacks,
it gains +3/0 and vigilance until your next turn.
If the enchanted creature destroys a black mana creature, exile it and gain life equal to its mana
cost.
The holy celestial light could be seen from afar and the
pure adored it while the wicked recoiled in fear.