Anamnesis

If 1 or more creatures entered play this turn and
weren't cast from an opponent's hand, you may
pay X life rather than pay this spell's mana cost,
where X is equal to the total converted mana cost
of all creatures that entered play this way. If you
do, you may pay {g}{g} during your next main
phase to add X.
Tap all creatures that entered play this turn and
weren't cast from a hand. They don't untap
during their controller's next 2 untap steps.