Enchant creature
When Knightly Valor enters, create a 2/2 white Knight creature token with vigilance. (Attacking doesn’t cause it to tap.)
Enchanted creature gets +2/+2 and has vigilance.
If the creature this Aura would enchant is an illegal target by the time Knightly Valor tries to resolve, the Aura spell doesn't resolve. It won't enter the battlefield, so its ability won't trigger.
13-07-2018
wotc
You need a creature for Knightly Valor to target as you cast it. There's no way to have it enter the battlefield attached to the Knight token it'll create.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.