This card was printed in the following sets:

Card Name: Symbol Set Block
Silvos, Rogue Elemental Onslaught (Rare) Onslaught Onslaught Block
Silvos, Rogue Elemental Vintage Masters (Rare) Vintage Masters Miscellaneous
Silvos, Rogue Elemental Eternal Masters (Rare) Eternal Masters General

This card has restrictions in the following formats:

Format Legality
Legacy Legal
Vintage Legal
Commander 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!