I’d need to go dig in on my MM, but I’m thinking of things like Legendary Actions, etc., which already set monsters into a different set of casting rules/economy than players. While monsters have additional options allowing them to cast extra spells, they’re still restricted by the bonus action spellcasting rule (unless they have a specific exception in their stat block).
Monsters follow the rules, but can be designed to break them.
Includes the debut of Monsters of the Multiverse, a comprehensive resource for players and Dungeon Masters alike, containing over 30 updated player character races and a massive bestiary with over 250 redesigned monsters and stat blocks, all for use in any D&D world.
Includes fifth edition’s best-selling rules expansions Xanathar’s Guide to Everything, Tasha’s Cauldron of Everything, and Monsters of the Multiverse, along with a Dungeon Master’s screen together for the first time in a beautiful slip case.
Each of the three books and the Dungeon Master’s screen feature special foil covers, available only with this release.
A perfect set for players and Dungeon Masters looking to expand their game with additional rules and character options.