leyline cards mtg of Sanctity (White Border) - Mystery Booster 2 Whenever you tap a creature for mana Mtg. Leyline of Abundance. Wilds

Old Knawbone helps to make Treasure tokens while Esika, God of the Tree, helps players to get the mana they need in the combinations they require for all these different colors of dragons

Mechanics that offer flexibility usually see play somewhere, even if that means you only see these cards in Commander

This is what that means in card names: 2 Wooded Foothills (GD, Onslaught) 1 Bloodstained Mire (GD, Onslaught) 1 Blood Crypt (PO, Dissension) 1 Breeding Pool (LP, Dissension) 1 Hallowed Fountain (LP, Dissension) 1 Mox Diamond (NM, From the Fault: Relics) 1 Steam Vents (GD, Guildpact) 1 Mana Crypt (NM, Judge Rewards Promos)

The most interesting thing about Lier, however, is the line Spells cant be countered. This is a symmetrical effect your spells cant be countered, but neither can your opponents

We may not come out of this with a fully comprehensive answer, but lets get into it and see what we can figure out

Neither continuity nor the idea of worldbuilding (creating distinctive and unique worlds and settings) would become issues until some time later