Grandfather Paradox

Subclass featureValdaPlayerPack2014Warlock

As a Magic action, you can goad a creature within 60 feet of you that can see or hear you into causing a paradox. The creature must make an Intelligence saving throw against your spell save DC. On a failed save, the creature takes 10d6 Psychic damage and has the Stunned condition for 1 minute as it is locked between opposing timelines. On a successful save, the target takes half as much damage only. The Stunned creature repeats the save at the end of each of its turns, ending the condition on itself on a success.

Once you use this feature, you can't use it again until you finish a Long Rest.

Raw data
{
  "name": "Grandfather Paradox",
  "level": 14,
  "__prop": "subclassFeature",
  "header": 2,
  "source": "ValdaPlayerPack",
  "entries": [
    "As a {@action Magic|XPHB} action, you can goad a creature within 60 feet of you that can see or hear you into causing a paradox. The creature must make an Intelligence saving throw against your spell save DC. On a failed save, the creature takes {@damage 10d6} Psychic damage and has the {@condition Stunned|XPHB} condition for 1 minute as it is locked between opposing timelines. On a successful save, the target takes half as much damage only. The {@condition Stunned|XPHB} creature repeats the save at the end of each of its turns, ending the condition on itself on a success.",
    "Once you use this feature, you can't use it again until you finish a {@variantrule Long Rest|XPHB}."
  ],
  "className": "Warlock",
  "classSource": "XPHB",
  "subclassSource": "ValdaPlayerPack",
  "subclassShortName": "Future You"
}