Two clearly separated layers of trust:
Sourced from Commander Spellbook's curated database. Card lists and produced results are shown here; the written steps and prerequisites live on Commander Spellbook, and every result links straight to them.
Generated locally by a deterministic rule engine that reads Oracle text. It checks a fixed list of proof obligations per template and shows you exactly which ones it could and could not confirm. A hypothesis is not a rules ruling, and "not found in Commander Spellbook" does not mean nobody has discovered it. Verify anything you intend to play.
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