Like most Pokmon cards, the value of Seadra 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 (Battle Styles)
Permanents with hexproof can still be targeted by spells or abilities you control
The other format you can use playtest cards in is limited formats involving Mystery Boosters
When youve got a hard counter for two mana it feels great, but it can be a little awkward in how it fits on curve, especially if your not running a high number of flash and instant cards or one drop wizards
And yet, I never noticed as a young kid opening packs and building 75-card casual decks to play with during lunch
The Pokmon trading card game has a surprising rising star, as a free promo Pokmon card begins selling for up to $100