Setting aside the fact that “a geyser 30 feet long and 1 foot wide” is much, much more than the 30 gallons specified by the Geyser function of this item, the decanter can apparently produce this amount indefinitely if continually activated. Ignoring the low hanging fruit like “extraplanar holding item bombs” and Immovable Rod shenanigans, there are many magic items in the 5e DMG that practically beg to tell their own story. I’ve been doing a cover to cover read of the 5e DMG, inspired by the awesome folks over at The Tome Show.
