This card was printed in the following sets:

Card Name: Symbol Set Block
Razortooth Rats Classic Sixth Edition (Common) Classic Sixth Edition Core Sets
Razortooth Rats Seventh Edition (Common) Seventh Edition Core Sets
Razortooth Rats Ninth Edition (Common) Ninth Edition Core Sets
Razortooth Rats Weatherlight (Common) Weatherlight Mirage Block

This card has restrictions in the following formats:

Format Legality
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
Pauper Legal
x For more information regarding each format and play style modifications, visit the Banned / Restricted Lists for DCI-Sanctioned Tournaments page on the Magic: The Gathering website.

Gatherer works better in the Companion app!