This card adds another useful piece to the puzzle, functioning as yet another Amulet effect, or more accurately, a Spelunking variant, that you can tutor for with Summoners Pact or Green Suns Zenith
While unbanning something like Stoneforge Mystic or Umezawa's Jitte would create a bit more equity and provide another solid reprint for a future Masters set, none of the other cards on the Modern banned list would be nearly as hyped or as expensive as Jace, the Mind Sculptor)
empty Legendary Creature Dragon5/5 Trample When Themberchaud enters, he deals X damage to each other creature without flying and each player, where X is the number of Mountains you control
Near the location of Halvar, Kaya was attacked once again by Varragoth but was saved by the elves
With a big enough board state, this could spell out doom for an unprepared opponent
Renamon The Digimon drawn on the card is Renamon