Know your deck before game night
Manamancer is a free deck builder for Magic: The Gathering, for players who want to understand a list before they sleeve it. It covers fourteen formats, each with its own rules: Commander, Standard, Pioneer, Modern, Legacy, Vintage, Pauper, Alchemy, Historic, Timeless, Standard Brawl, Brawl, Pauper Commander and Canadian Highlander. Searching cards, reading guides and articles, and browsing public decks need no account; saving a deck does.
Numbers that lead to decisions
The builder checks a list against its format while you edit and flags problems rather than blocking them. The statistics panel shows the mana curve, the colors your mana base has to feed, and estimated ramp, card draw and removal. How to read your deck statistics and Understanding format legality explain where those checks stop.
A Commander Agent that only recommends real cards
The in-app Agent reviews a Commander list and proposes additions, cuts and swaps. Before a suggestion reaches you, the server checks that the card exists, is legal in Commander and fits your commander's color identity. You apply or dismiss each suggestion yourself. AI use is Commander-only and metered in monthly AI credits, with a few included on the Free plan. How the validated Commander Agent works shows where that guarantee stops.
Precons, articles and the tutorial
The precon catalog lists official preconstructed decks, priced at the current value of their singles. The articles review new sets and precons using Manamancer's own card index and a daily price archive going back to February 2024. The tutorial walks through the app in about five minutes, Explore lists published decks, and the about page covers the project.
Manamancer is unofficial fan content. Magic: The Gathering and its card imagery are owned by Wizards of the Coast. Card data and images are provided by Scryfall.
