So, I want to make 1000 D&D starting characters. I want them to have random attributes. I know you should use Chainlink, but, it is 0.1 LINK per random request which is around $3 at the time of this writing, and $3000 for 1000 random calls. This will only get worse as the price of LINK continues to rise. What alternatives NFT creators have for this kind of use case?