If it's the beginner tournament on 4/10, I believe prizes are same as one from February (as posted on Craigslist anyway):
2nd: Event Mask
3rd: Valken packs
Knights has always given out legit prizes for their tournaments held. Used to run cash scrambles and all sorts of other formats I'm hoping to see return this summer
EDIT: Their tournaments are also some of the least expensive so you're not paying much more than a regular day at the field anyway.