Deeproot Historian 
Creature — Merfolk Druid
$0.26 #7485 0.11 2.9 years
Merfolk and Druid cards in your graveyard have retrace. (You may cast cards with retrace from your graveyard by discarding a land card in addition to paying their other costs.)
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Cards similar to Deeproot Historian expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Six71%
$5.00↑#590↑0.47↑2.3 years
"During your turn, nonland permanent cards in your graveyard have retrace."