40 cards where the card types include “sliver” and the colors ≤ RU

Barbed Sliver (Tempest Remastered #126)
Battering Sliver (Time Spiral Remastered #154)
Battle Sliver (Magic 2014 #128)
Belligerent Sliver (Magic 2015 #129)
Bladeback Sliver (Modern Horizons #119)
Blade Sliver (Commander Masters #871)
Blur Sliver (Commander Masters #873)
Bonesplitter Sliver (Commander Masters #874)
Capricious Sliver (Commander Masters #734)
Cleaving Sliver (Commander Masters #877)
Diffusion Sliver (Commander Masters #845)
Frenetic Sliver (Planar Chaos #157)
Fury Sliver (Time Spiral Remastered #164)
Galerider Sliver (Commander Masters #849)
Heart Sliver (Tempest #182)
Hollowhead Sliver (Commander Masters #878)
Homing Sliver (Time Spiral Remastered #171)
Hunter Sliver (Legions #102)
Magma Sliver (Legions #107)
Mesmeric Sliver (Future Sight #53)
Metallic Sliver (Tempest Remastered #226)
Mistform Sliver (Legions #46)
Mnemonic Sliver (Tempest Remastered #62)
Psionic Sliver (Time Spiral #72)
Screeching Sliver (Time Spiral #75)
Scuttling Sliver (Modern Horizons #68)
Sedge Sliver (Time Spiral Remastered #187)
Shadow Sliver (Time Spiral #76)
Shifting Sliver (Commander Masters #855)
Sliver Construct (Magic 2014 #218)
Spiteful Sliver (Commander Masters #881)
Striking Sliver (Commander Masters #882)
Synapse Sliver (Commander Masters #857)
Synchronous Sliver (Planar Chaos #48)
Taunting Sliver (Commander Masters #727)
Telekinetic Sliver (Time Spiral #84)
Thorncaster Sliver (Magic 2014 #158)
Two-Headed Sliver (Commander Masters #883)
Venser's Sliver (Time Spiral #267)
Winged Sliver (Commander Masters #860)

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