Swimming through deep water (more than 100 feet deep) presents additional challenges because of the water's pressure and cold temperature. After each hour of swimming in deep water, a creature that lacks a Swim Speed must succeed on a DC 10 Constitution saving throw or gain 1 Exhaustion level.
Deep Water
HazardXDMGp. 682024
Raw data
{
"name": "Deep Water",
"page": 68,
"__prop": "hazard",
"source": "XDMG",
"entries": [
"Swimming through deep water (more than 100 feet deep) presents additional challenges because of the water's pressure and cold temperature. After each hour of swimming in deep water, a creature that lacks a Swim Speed must succeed on a {@dc 10} Constitution saving throw or gain 1 {@condition Exhaustion|XPHB} level."
],
"trapHazType": "ENV"
}