24 cards where it’s legal in Historic and the card types include “sliver”

Belligerent Sliver (Magic 2015 #129)
Bladeback Sliver (Modern Horizons #119)
Blur Sliver (Commander Masters #873)
Bonescythe Sliver (Commander Masters #815)
Cleaving Sliver (Commander Masters #877)
Cloudshredder Sliver (Commander Masters #919)
Diffusion Sliver (Commander Masters #845)
Dregscape Sliver (Modern Horizons #88)
Enduring Sliver (Modern Horizons #6)
First Sliver's Chosen (Modern Horizons #9)
Hollowhead Sliver (Commander Masters #878)
Lancer Sliver (Modern Horizons #18)
Lavabelly Sliver (Commander Masters #927)
Leeching Sliver (Magic 2015 #102)
Manaweft Sliver (Commander Masters #900)
Predatory Sliver (Magic 2014 #189)
Scuttling Sliver (Modern Horizons #68)
Sentinel Sliver (Commander Masters #835)
Sliver Hivelord (Commander Masters #937)
Spiteful Sliver (Commander Masters #881)
Steelform Sliver (Magic 2014 #38)
Striking Sliver (Commander Masters #882)
Tempered Sliver (Modern Horizons #183)
The First Sliver (Modern Horizons #200)

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