50 cards where the border color is “borderless” and the set is “ust”

Accessories to Murder (Unstable #167)
Applied Aeronautics (Unstable #168)
Arms Depot (Unstable #169)
Auto-Key (Unstable #170)
Bee-Bee Gun (Unstable #171)
Boomflinger (Unstable #172)
Buzz Buggy (Unstable #173)
Deadly Poison Sampler (Unstable #174)
Dictation Quillograph (Unstable #175)
Dispatch Dispensary (Unstable #176)
Division Table (Unstable #177)
Dogsnail Engine (Unstable #178)
Dual Doomsuits (Unstable #179)
Duplication Device (Unstable #180)
Faerie Aerie (Unstable #181)
Genetic Recombinator (Unstable #182)
Gift Horse (Unstable #183)
Gnomeball Machine (Unstable #184)
Goblin Slingshot (Unstable #185)
Guest List (Unstable #186)
Hard Hat Area (Unstable #187)
Head Banger (Unstable #188)
Hypnotic Swirly Disc (Unstable #189)
Inflation Station (Unstable #190)
Insufferable Syphon (Unstable #191)
Jamming Device (Unstable #192)
Lackey Recycler (Unstable #193)
Mandatory Friendship Shackles (Unstable #194)
Neural Network (Unstable #195)
Oaken Power Suit (Unstable #196)
Optical Optimizer (Unstable #197)
Pet Project (Unstable #198)
Quick-Stick Lick Trick (Unstable #199)
Rapid Prototyper (Unstable #200)
Record Store (Unstable #201)
Refibrillator (Unstable #202)
Sap Sucker (Unstable #203)
Sundering Fork (Unstable #204)
Targeting Rocket (Unstable #205)
Thud-for-Duds (Unstable #206)
Top-Secret Tunnel (Unstable #207)
Tread Mill (Unstable #208)
Turbo-Thwacking Auto-Hammer (Unstable #209)
Twiddlestick Charger (Unstable #210)
Widget Contraption (Unstable #211)
Plains (Unstable #212)
Island (Unstable #213)
Swamp (Unstable #214)
Mountain (Unstable #215)
Forest (Unstable #216)

In the blink of an eye, they strode from deep snow to the end of this search.