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.)") - Source 3 (RL01 Yavimaya Forest - "In Mirage, we made a legendary land called Teferi's Isle , which was the only legendary land in the set. We decided to make it part of a five-year mega-mega cycle, meaning it would span multiple blocks. The lands showed up in the first set of the first year, the second set of the second year, the third set of the third year, the second set of the fourth year, and the first set of the fifth year.")