
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.)
Deeproot Historian has 2 printings, first in The Lost Caverns of Ixalan Commander (2023). EDHREC ranks it #7,543 among Commander cards. It appears most in Hakbal of the Surging Soul decks (15,882 on EDHREC). 1 public deck on TCG runs it. It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.