Disks of Doom [a broken PF build idea]

[TuggyNE]

Right, and since free actions, AS WRITTEN, do NEED the DM's intervention, this means they are not valid TO material.

There's a crucial distinction between "you can limit this if you like" and "this can only be done with specific approval". The latter is the case for e.g. spell research, custom magic items, and the like, which is why those are very seldom TO'd with. But the former is just fine, since it works by default and has to be actively shut down, as opposed to not working by default and needing to be actively allowed.

[Slipperychicken]

There's a crucial distinction between "you can limit this if you like" and "this can only be done with specific approval". The latter is the case for e.g. spell research, custom magic items, and the like, which is why those are very seldom TO'd with. But the former is just fine, since it works by default and has to be actively shut down, as opposed to not working by default and needing to be actively allowed.

More concisely, TO generally assumes a passive GM who isn't willing to rule either way.