Resurrective Emergence

Whenever an opponent casts a creature, it gains '{x}{w}: Return this creature from a graveyard to the battlefield under your control. Only an opponent may activate this ability.'
{x}{x}{x}{w}{w}{w}: Return x target creatures with converted mana cost x or less from a graveyard to the battlefield under your control.
{x}{x}{x}{x}{x}{w}{w}{w}{w}{w}: Until end of turn, return x target creatures from your graveyard to the battlefield. They gain haste and get +x/+x.