Netitus is a fireproof shield belonging to the legendary Flash Magnus.
Long ago, Netitus used to belong to Commander Ironhead. After his troops were captured by Torch, Flash Magnus is given Netitus in order to better stand a chance against the Dragon, as it can withstand fire. The item became deeply connected to Flash Magnus ever since.
It is revealed that it became the trophy item for the winner of the Inter-Species Race, and one of the items called by the Cutie Map to retrieve for the Pillars of Equestria. Sapphire was the one who retrieved it successfully.