Dax, paranoid paladin

Vigilance
Dax, Paranoid paladin must attack each turn
Damage dealt by Dax, Paranoid paladin to devils, demons, fiends and undead is doubled
If a devil, demon, fiend or undead dealt damage by this creature would be put into a graveyard this turn, exile it instead
{w}{r}{t}: this creature gains +{x}/+0 where {x} is your devotion to {w}{r}