Your search for "Slither Blade 71" revealed the following:
Slither Blade (OTC) from Outlaws of Thunder Junction Commander, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Zezhou Chen Card Text:Slither Blade can't be blocked.
Slither Blade (Foil) (AKH) from Amonkhet, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Zezhou Chen Card Text:Slither Blade can't be blocked.
Slither Blade (AKH) from Amonkhet, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Zezhou Chen Card Text:Slither Blade can't be blocked.
Slither Blade (ZNC) from Zendikar Rising Commander, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Zezhou Chen Card Text:Slither Blade can't be blocked.
Slither Blade - AKH Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Zezhou Chen Card Text:Slither Blade can't be blocked.