DMs, have you ever included an item in your loot piñata's inventory 'just for fun?' Players, have you ever identified a custom magic item and responded with "What the bloody blue hell?
" That's the basis of this game.
Here's how it works: One person describes a unique magic item that is neither weapon nor armor/shield, nor explicitly designed to work to augment offense/defense, for the purposes of this game; there's no need to spend too much time handwringing over the precise price or the exact combination of magics to make it work as described. The next person comes up with a legitimate, in-game use for the item aside from selling it, siphoning off the magic, or otherwise making it someone else's problem. That person, in turn, describes a new magic item, and so on. Clear?
First magic item: This ordinary looking, polished metal mirror has been permanently enchanted with an "always on"
Dimension Door effect. Any living, sentient (INT > 2) creature who touches its surface is instantly transferred to a spot up to 30' away which is capable of supporting that creature's weight, with no saving throw.
