If you don't want to spend money on crypto, you can grow your own. Farmers who use their GPUs to mine NFTs will join other people on the blockchain who are also mining.
Ragnark is an upcoming project that will be introducing to the ether, their "Gamified Automated NFT Drop" (G.A.N.D.), this unique project includes innovative game theory, robust tokenomics, efficient smart contract design, combine to fuel a rewards laden. All battles are randomly chosen.. The more you accumulate, the more you will be able to survive.