Its likely this is also a cycle, featuring an activated ability to sacrifice the land and search your library for a basic land that gets put directly onto the battlefield tapped
The final ability has some spice to it, too
Think cards like Scrawling Crawler or Nekusar, the Mindrazer, which give people cards but hurt them as they draw
Illuna, Apex of Wishes Illuna, Apex of Wishes is already a massive flying trampler regardless of its other abilities
However, both players can draw until they have 7 cards in their hand if Genger and Mimikyu GX has more than one Psychic energy card attached to it
The five colours, in addition to characterizing specific terrains and specific fantasy types, would also correspond to the strategies of certain colours from a gameplay mechanic -- the type of ways they would win, the types of counter-abilities they could do, and the flavour of the characters associated with them