What Determines a Pokmon Cards Value
As long as you target the right cards (namely cards that have a life outside of Standard) you should win every time
So, when you want to play a card, you exert (a term similar to tapping in Magic , but due to licensing rights, other authors have to come up with strange terms
Shock lands are some of the best fixing there is, whether you're in the two-color pair or using them to splash a color, having a land that produces two colors and can virtually always enter untapped is great
In the most recent StarCityGames Open, a W/U Control list by Eric Rill placed second that included Nyx-Fleece Ram in the sideboard: W/U Control

Seismitoad #52Uncommon $0.18 Dolliv #20Common $0.18 Bellossom #3Uncommon $0.26 Frogadier #57Uncommon $0.18 Charmander #26Common $0.24 Steenee #17Common $0.13 Shuckle #5Common $0.15 Sharpedo #47Uncommon $0.20 Phantump #11Common $0.14 Combee #8Common $0.12 Klawf #11Promo $0.43 Klawf #105Uncommon $0.13 Klawf #90Uncommon $0.08 Klawf #55Uncommon $0.08 Klawf #31Uncommon $0.12 Klawf - 048/078 #48Rare $0.24 Klawf - 088/078 #88Art Rare $2.25 Klawf - 122/198 #122Rare $0.14 Klawf - 122/198 (Cosmo Holo) #122Promo $0.37 Klawf - 217/198 #217Illustration Rare $5.34 Pikachu & Eevee Poke Ball Collection $230.64 Pokemon - Poke Ball Tin - Poke Ball $25.11 Pokemon - Poke Ball Tin - Quick Ball $44.59 Pokemon TCG: Basic Energy Box Let's Play Theme Deck [Pikachu] $37.61 Let's Play Theme Deck [Eevee] $49.46 Kanto Friends Mini Tin [Bulbasaur] $33.53 Kanto Friends Mini Tin [Pikachu] $27.82