Vanguard,Who Seeks Revenge

Creatures that are enchanted or equipped
get -3/-3. {t} Draw a card if an aura entered
a graveyard this turn.
Whenever an enchantment or equipment
are cast, you may pay {b/g}. If you do, gain
1 life and each opponent loses 1 life.
Standing there in all your grand naivety
About to reap what you have sown