Paste your cube. We run 500 Monte Carlo drafts with mixed-policy agents, measure deck quality / color balance / archetype survivability, then ask an LLM to propose specific swaps — each one verified by re-simulating with the swap applied.
Every recommendation is earned. The agent reads the metrics before it opens its mouth, and it re-drafts its own proposals before it ships them to you.
Static metrics first — color distribution, curve, rarity mix, removal density. The cheap pass before any drafting.
500 × 8-seat drafts using greedy, synergy, and adaptive bots. Per-archetype DQI, color contestedness, pick-order timing — all returned as structured metrics.
An LLM ranks candidate swaps via Scryfall search, then re-runs the sim with the swap set applied. Suggestions that don't move the needle get dropped.
Here's an abbreviated preview of the shareable report. Yours will have your cube's name, your weak archetypes, your under-drafted colors, and swap suggestions tied to specific scryfall IDs so you can queue them up in CubeCobra.
Cube folks don't trust black boxes. Every run carries its configuration. If you're skeptical, the sim is the same one the Cardivore app ships — we just point the agent at it.
~3 minutes. You'll get a shareable report URL when it's done. One free run per IP per 24 hours. Install the app for unlimited runs on your own cubes.
Cardivore is a full MTG companion — collection tracking, deck analysis, cube building, card scanning. The Cube Doctor is one of many AI tools inside.
You shouldn't, in isolation. The bots are three distinct policies that each draft badly in predictable, human-ish ways. Across 500 drafts that noise averages out and you can see which archetypes survive, which colors over-draft, and which cards get table-wheeled to death. That's the signal. The LLM reads the signal; it doesn't invent it.
Deck Quality Index (0–5). A weighted composite of threat density (creatures 14–17), answer density (4–6 removal), curve efficiency (avg CMC 2.5–3.2 with 8+ early plays), and consistency (color count + fixing). Sanity caps prevent a 2-creature deck from scoring 5.
The agent searches cards within your cube's rough power band. It flags out-swap candidates from your cube and in-swap candidates from Scryfall, filtered to format legality. If the suggestions feel off-pitch, tighten your cube's archetype definitions in CubeCobra before running again.
One free run per day per IP while the budget holds (we cap marketing spend at $50/day). Install the Cardivore app to run the Doctor on any cube you've loaded, unlimited.
A TypeScript port of Cardivore's on-device Dart draft simulator. Open source plans pending. Uses a custom LCG RNG so runs are reproducible given the same seed.
Paste a CubeCobra URL and go. 3 minutes later you'll have a shareable diagnosis.
Diagnose my cube →