Everything runs in your browser — bring your own list, or forge one from your collection.
How Manaforge worksManaforge is a decision-support system, not an autopilot. It gathers the same evidence a strong deckbuilder would, scores every option against explicit, measurable criteria, and shows you its reasoning. There is no black-box AI making the choices: the same inputs always produce the same deck, and every card can tell you why it earned its slot.
Three authoritative, openly published sources — all queried live from your own browser, so your collection never leaves your device:
Ground truth for every card: mana value, type, rules text, colour identity, format legality, market price.
Aggregated statistics from hundreds of thousands of real Commander decklists — the wisdom-of-crowds signal.
A human-curated catalogue of thousands of known card combos and the effects they produce.
Every candidate card is scored with a weighted-sum model — the classic method of multi-criteria decision analysis (MCDA) — across four normalised criteria:
Criteria are min-max normalised so none can dominate; crowd-favourite and power-level adjustments are then layered on. The weights shift with the bracket you pick — a casual build leans on synergy, a cEDH build on efficiency and raw inclusion.
Scoring ranks the cards; a constrained greedy optimiser builds the deck. It fills role quotas in priority order — ramp, removal, card draw, wipes, protection — under the hard constraints a legal, functional Commander deck must satisfy:
Then the official Commander Brackets are enforced as measurable caps — how many Game Changers, tutors, mass-land-denial pieces, extra-turn spells and two-card combos the target bracket permits. Upgrade can raise or lower a deck to fit its bracket.
Instead of guessing, Manaforge computes a transparent 0–100 speed index — a linear combination of measurable acceleration signals (fast-mana density, cheap ramp, low curve, tutor count) calibrated against real decks of known power. Honest limit: this is a density proxy, not a turn-by-turn simulation — it estimates a deck's potential to go fast, not the exact turn it wins.
Your list is matched against Spellbook's catalogue as a graph: each combo is a small network of cards linked to the effect they produce. Every combo is classified live (all pieces present), one card away (a single addition completes it), or unreachable — which is exactly what drives the combo map and the buy suggestions.