Shift allows the four cost card to be deployed for only three ink, Evasive makes him difficult to challenge, and Challenger +3 gives him a boost when he's on the attack
Where to find it: From what I've been able to tell, you can get your hands on a version of this card without breaking the bank - it's commonly less than $5 on TCG Player
The Mystery Booster 2 Playtest Card Notes section (reproduced here in individual Gatherer rulings) provides guidance for fitting these cards into the existing rules structure
GameStops PSA drop-off service, for instance, requires every card to arrive in penny sleeves and card savers, and most grading companies would rather you skip toploaders, which are harder to open safely
Mime Psychic Rare 23/64: Nidoqueen Grass Rare 24/64: Pidgeot Colorless Rare 25/64: Pinsir Grass Rare 26/64: Scyther Grass Rare 27/64: Snorlax Colorless Rare 28/64: Vaporeon Water Rare 29/64: Venomoth Grass Rare 30/64: Victreebel Grass Rare 31/64: Vileplume Grass Rare 32/64: Wigglytuff Colorless Rare 1/64: Clefable Colorless Rare Holo 2/64: Electrode Lightning Rare Holo 3/64: Flareon Fire Rare Holo 4/64: Jolteon Lightning Rare Holo 5/64: Kangaskhan Colorless Rare Holo 6/64: Mr
Caduceus, Staff of Hermes (ACR etched $7) Is this an unfair card in a format where you start at 40 life