A Vitalik Buterin-themed NFT collection that stores the image data directly on Ethereum became the blockchain's top gas guzzler on Friday and caused a brief spike in Gwei.

The project, dubbed Buterin Cards, had used up 13.1% of the total gas units over the past three hours as of 3:00 p.m. ET, ranking it above the Uniswap universal router address and Tether's public address, according to the Ethereum blockchain explorer Etherscan. The collection triggered transaction fees of 318.31 ETH worth $665,670 over the past 24 hours. 

After the spike, gas usage has since fallen back behind Uniswap. 

What are Buterin Cards? 

The Buterin Cards project aims to upload 2,015 NFTs paying homage to Vitalik Buterin, co-founder of the Ethereum blockchain. The project uses an NFT minting …