Melody of Forgotten Fairytale

Tap all creatures. Creatures your opponents control don't untap during their next untap step. Then you may pay {2}{g}. If you do, target creature with power 3 or less becomes a 5/5 Elemental creature with haste. Untap it.
"You must return to the world and may where ever
you step be the home to my children. The age of the forest will rise from the ashes. All will be well."