Killing Tiamat inside a Forcecage

[Unoriginal]

... Uh. I bought RoT and have been skimming it, so saw the statblock and the potential to stop the summoning/weaken her (planning to insert something similar, but I want to use Orbs of Dragonkind instead), as well as taking inspiration on how her cult could act. I had missed her doing something so dumb.

Less dumb when you consider the PCs in question are a bunch of lvl 14 max PCs (unless I'm mistaken).

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I'm not sure I want to give her too much spellcasting, but perhaps something on top of Divine Word could work. The idea of her channelling magic through her breath weapons is neat, however: some sort of primal, pure draconic might. Maybe toss in Power Word Stun and Power Word Pain, since I love the idea of gods speaking a single word of pure power.

You could give her the capacity to turn into the different substances/energies her breaths are made of.

But yeah, gods do use the Words of Creation to create and alter worlds.