Brynhildr the Valkyrie

Flying, Vigilance
When Brynhildr enters the battlefield, target
creature an opponent controls becomes a Beloved
in addition to its other creature types.
When Brynhildr battles a Beloved creature,
Brynhildr gains +5/+5 until the end of this turn.
{5}, {t}: Destroy target Beloved creature, then return
Brynhildr to its owner's hand.