As an action, you can spread a single bag of caltrops to cover a 5-foot-square area. Any creature that enters the area must succeed on a DC 15 Dexterity saving throw or stop moving and take 1 piercing damage. Until the creature regains at least 1 hit point, its walking speed is reduced by 10 feet. A creature moving through the area at half speed doesn't need to make the saving throw.
{
"srd": true,
"name": "Caltrop",
"page": 151,
"type": "G",
"value": 5,
"__prop": "item",
"rarity": "none",
"source": "PHB",
"weight": 0.1,
"entries": [
"As an action, you can spread a single bag of caltrops to cover a 5-foot-square area. Any creature that enters the area must succeed on a {@dc 15} Dexterity saving throw or stop moving and take 1 piercing damage. Until the creature regains at least 1 hit point, its walking speed is reduced by 10 feet. A creature moving through the area at half speed doesn't need to make the saving throw."
],
"_category": "Other",
"_entryType": "adventuring gear",
"_textTypes": [
"adventuring gear"
],
"basicRules": true,
"_attunement": null,
"_isEnhanced": true,
"_entrySubType": "",
"_attunementCategory": "No Attunement Required"
}