A unique Spiderman drawing by Marvel comics artist Adam Kubert has sold for 12.75 Ether (ETH) ($25,000) after being turned into a non-fungible token on the Ethereum blockchain.

Kubert’s piece is one of 25 unique artworks expected to be launched as NFTs by several Marvel artists, including Dan Panosian, Matteo Scalera, Dave Johnson, Andy Kubert and Eric Canete, as announced on Feb. 15.

The NFTs are to be sold on Portion.io, a platform that allows users to create and auction rare art on the Ethereum blockchain. 

A recent announcement by the Portion team stated, “We would like to announce that professional Marvel artists have decided to make Portion.io their home, and will be releasing approximately 25 unique Marvel pieces on the Portion.io platform […] The first wave of artists are Dan Panosian, Matteo Scalera, Dave Johnson, Andy Kubert, Adam Kubert, and Eric Canete.”

Some of the NFTs come with added bonuses for would-be purchasers, such as original physical artboards and signed comic books. On the same day, Portion announced a new partnership with rare comic and artwork hub, Essential Sequential. Portion believes it will see a steady migration of rare artwork onto its NFT platform in the coming years. Referring to Essential Sequential, the recent announcement stated:

“The original artwork, books, prints and more from some of the most recognizable names within the industry can all be found here. Over time, we believe that our platform will become the place for the merging of iconic Art and digital permanence.”

As reported by Cointelegraph, more than $100 million worth of NFTs were sold in the past 30 days alone. The perception of NFTs as a legitimate store of artwork — or value in general — was boosted recently when London auction house Christie’s auctioned off its first purely digital work.