Blueprints are a key item that will modulate the supply of trains in MetaRails. Each train can mint a limited number of blueprints. These blueprints will have corresponding rarities/tiers as the trains that they originate from. Blueprints are supplied to Factories as a seed from which the process of manufacturing a train begins and lasts over a period of time.
Genesis Train holders will be entitled to create the first Factories. After the initial Factories have been minted, all players can use $MRF to pay for a Factory. As mentioned above, Factories will take in a blueprint from an existing train and use it as a seed from which they will generate new trains. This means that better quality blueprints will produce better trains. Factories will be the inflationary centers of the game that expand the Train supply.