Chromatic Wellspring

As Chromatic Wellspring enters the battlefield,
you may pay 3 life or exile a card from your
graveyard. If you don't, Chromatic Wellspring
enters the battlefield tapped.
{t}: Add one mana of any color. Each
opponent gains 1 life.
Behold the blessing of harmony in its purest
form: benefit for benefit, assistance with assiduity,
harm for harm.