Not to the Death, for Glory!

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)

Target legendary creature you control fights
target creature you don't control. If creature you control is named Lord Owain, it gains Undying
until the end of turn. (If this creature would die
and doesn't have a +1/+1 counter on it, return it to the battlefield with a +1/+1 counter.)