Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

As Illusionary Terrain enters the battlefield, choose two basic land types.

Basic lands of the first chosen type are the second chosen type.

Destroy target land. Melt Terrain deals 2 damage to that land's controller.

Enchant land

As Phantasmal Terrain enters the battlefield, choose a basic land type.

Enchanted land is the chosen type.

Treacherous Terrain deals damage to each opponent equal to the number of lands that player controls.

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)