Once per turn when you cast a Hex as a Magic action, you can cast a Witch cantrip that isn't a Hex and has a casting time of an action as a part of that casting.
Hastened Hex
Raw data
{
"name": "Hastened Hex",
"level": 9,
"__prop": "classFeature",
"source": "ValdaSpire24",
"entries": [
"Once per turn when you cast a {@filter Hex|spells|level=0|subschool=hex} as a {@action Magic|XPHB} action, you can cast a {@filter Witch cantrip that isn't a Hex|spells|level=0|class=witch (VSS'24)|subschool=!hex|cast time=action} and has a casting time of an action as a part of that casting."
],
"className": "Witch",
"classSource": "ValdaSpire24"
}