We sleeved the decks, shuffled the hell out of them and began to play
Like most Magic: The Gathering cards, the value of Snowhorn Rider depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Khans of Tarkir)
Furthermore, Its Water Gun attack benefits from Rain Dance by increasing damage based on the amount of Energy attached, and its Confuse Ray can further stall and damage opponents as it defends with 80HP, a massive amount for a Basic Pokemon in this format
If you do, you may attach it to this creature
Wizards of the Coast did a decent job of making Sliver Swarm, but there are just so many Slivers that they couldn't include them all