From the very first version of the official WotC tournament rules: The last card on the list [Shahrazad] requires players to play sub-games of Magic
Creature Artifact - Golem Jin-Gitaxias, Progress Tyrant Whenever you cast an artifact, instant, or sorcery spell, copy that spell
The criteria are subjective, which may include a cards power level, flavor, synergies, or various other intangibles
A common play pattern would be: I attack with my creature, you block, they both trade, and I follow it up with a revolt spell
Canopy Lands MH1 Nurturing Peatland $7.49 Sunbaked Canyon $9.99 Fiery Islet $8.49 Silent Clearing $6.49 Waterlogged Grove $6.49 The Canopy lands from Modern Horizons have had some time to establish themselves at this point, but theyre still cheaper than I wouldve expected