Valhalla, Hall of Heroes

{t} Add {r/w}to your mana pool.
Whene a creature you control dies in combat,
you may pay 2{r/w}. If you do, exile that creature.
If you control a creature named Odin or Frigg,
you may pay 1{r/w} instead. Put a +1/+1 counter
on target creature you control, return the exiled
creature to the battlefield under your control.
In the hallowed halls of Valhalla, the bravest
warriors are reborn to fight again.