Valka created this shield at some point during her stay with the dragons and the Bewilderbeast, out of undetermined materials. She wielded it, along with her staff when she encountered Hiccup the first time in the air and at her lair.
Valka brought in her shield during the attempted ambush toward Grimmel the Grisly. She used it to protect herself and her son from the flammable acid of Grimmel's Deathgrippers, but as the dragon's acid slowly burned through it, Valka was forced to throw her shield away and leave it in Hiccup's Hut, where it presumably burned away.
Valka's shield appears as a collectible item found by the legendary dragon, the Bewilderbeast, during its search. This collection item can be used to complete collections for resources and novel dragons.
Valka's shield is oval in shape and appears to be stitched together in patchwork fashion out of a relatively thin-looking material. She has painted it in the primary colors: blue, red, and yellow.