You gain resistance to fire damage, and you don't suffer the effects of extreme heat, as described in the Dungeon Master's Guide. Moreover, as an action, you can touch a flammable object that isn't being worn or carried by anyone else and set it on fire.
Desert
Raw data
{
"name": "Desert",
"page": 10,
"level": 6,
"__prop": "subclassFeature",
"source": "XGE",
"entries": [
"You gain resistance to fire damage, and you don't suffer the effects of extreme heat, as described in the Dungeon Master's Guide. Moreover, as an action, you can touch a flammable object that isn't being worn or carried by anyone else and set it on fire."
],
"className": "Barbarian",
"classSource": "PHB",
"subclassSource": "XGE",
"subclassShortName": "Storm Herald"
}