Launch a collection
You deploy a fresh contract through the factory and become its founder. Supply and the founder fee are yours to set, and you define your own rarity spectrum.
Define the tiers buyers roll into — as many as ten, any split you like. Rarity is drawn from keccak256(id), and selling then rebuying re-rolls the id — so the spectrum is something the market moves through, not a fixed mint.
Drop an image for each tier — it pins to IPFS and becomes that tier's NFT art. Leave a slot empty to launch it as a placeholder.
Advanced — paste an IPFS base URI instead
How much you'll seed the first pool with. The ratio sets the opening price — and the price sets the largest buy that can physically fit in one transaction, because each whole token minted costs gas.
Each whole token minted costs gas, and a transaction caps at ~426mints. Seed too cheap and an ordinary buy can't fit — the collection looks live but can't be traded. Shape it tight: fewer tokens, a higher price.