Name:Dusk
ManaCost:2 W W
AlternateMode: Split
Types:Sorcery
A:SP$ DestroyAll | Cost$ 2 W W | ValidCards$ Creature.powerGE3 | SpellDescription$ Destroy all creatures with power 3 or greater.
SVar:NeedsToPlayVar:Y GTZ
SVar:Y:Count$Valid Creature.OppCtrl+powerGE3
SVar:Z:Count$Valid Creature.YouCtrl+powerGE3
SVar:Picture:http://www.wizards.com/global/images/magic/general/dusk_dawn.jpg
Oracle:Destroy all creatures with power 3 or greater.

ALTERNATE

Name:Dawn
ManaCost:3 W W
Types:Sorcery
K:Aftermath
A:SP$ ChangeZoneAll | Cost$ 3 W W | ChangeType$ Creature.powerLE2+YouCtrl | Origin$ Graveyard | Destination$ Hand | SpellDescription$ Return all creature cards with power 2 or less from your graveyard to your hand.
SVar:SplitNeedsToPlayVar:ZZ GE1
SVar:ZZ:Count$ValidGraveyard Creature.YouCtrl+powerLE2
Oracle:Aftermath (Cast this spell only from your graveyard. Then exile it.)\nReturn all creature cards with power 2 or less from your graveyard to your hand.