Lethe is a Python CLI tool that generates a complete 78-card tarot deck plus a card back using Replicate's API, with support for Flux, SDXL, and style-transfer models. An interactive questionary-based CLI guides users through style prompts, model selection, aspect ratio, parallelism, and reference image configuration. The tool maintains style consistency across all cards using seed derivation and style prefixes, with optional per-suit reference images for fine-grained control. Card definitions are fully customizable via YAML, and a symmetrical card back is automatically generated at the end of every run.