Fetch Lands, Sacrifice Lands, and self-mill effects all help load your graveyard with Lands, then Lumra brings them all back at once
In this case, players need to pay 3 life to get the land untapped (time will tell if the other lands have the same requirement)
Root Out: Naturalize for one more mana
Mark of Munity permanently buffs our commander with +1 +1 counters
But even if you dont have a copy of this powerful creature, the main thing is that there are any number of one-mana Druids that tap for a mana, and theyre all quite good in a Chulane deck
Its a bit fringe, but once youve collected the right amount of duplicate commons and uncommons, your vault will activate, and if opened, can reward you with six wildcards: one mythic rare, two rares, and three uncommons