Reach

{1}{G}, {T}: Create Artemis's Boon attached to a creature you control. It fights up to one target creature an opponent controls. (If you control another Boon on it, put that one into the graveyard. Enchanted creature gets +1/+1 and gains "Whenever this creature would deal damage roll a d20. If the result was 20, this creature instead deals triple that damage".)