Les cinq cartes Kor Haven, Teferi's Isle, Volrath's Stronghold, Keldon Necropolis et Yavimaya Hollow forment un méga-méga-cycle de terrains légendaires associés chacun à une couleur de mana. Ces terrains édités chacun dans des éditions différentes représentent des lieux notables liés à la Storyline de l'Aquilon.

Source 1 (Archdruid's Charm - "Skip ahead to Stronghold design [...] The story took place in Volrath's Stronghold [...], and I really wanted to make a legendary land for it. I'd remembered that in Mirage, we made Teferi's Isle as a single legendary land that created blue mana. Inspired by my success with the Atog s but thinking bigger, I came up with an idea that I called the "mega-mega cycle." We would print a card from a cycle once each block for five years.") - Source 2 ("What if Teferi's Isle was the first card of a "mega-mega-cycle?" In each block, R&D would include a legendary land in the cycle for the next five years. (It was called a "mega-mega-cycle" as opposed to a "mega-cycle" since the cards would appear once per block rather than once per set.)")