Flask of Elemental Earth

While the elemental once imprisoned in this flask has long departed, some of its energy is still contained within, ready to be released when the flask is broken. You activate a flask of elements by removing a wax seal from the stopper. If you or anyone else hurls the flask (another Interact action), it explodes where it lands. Your toss can place the center of the explosion—a 20-foot burst—anywhere within 60 feet, though at the GM's discretion, you might need to make an attack roll if the throw is unusually challenging. If no one hurls the flask by the start of your next turn, it shatters harmlessly. The effect of the explosion depends on the type of flask.

The flask explodes in shards of glass that grow into sharp spikes; this explosion has the earth trait. Creatures within the area take 3d6 piercing damage with a DC 23 basic Reflex save. The ground in the area becomes hazardous terrain for 1 hour, and any creature that moves into one of these squares or ends its turn in one takes 1d6 persistent bleed damage. A creature can take this damage only once per turn.