A curse coming from a unicorn's horn that is no longer attached to a unicorn. This is why Sprugtooth recommends not harming unicorns!
Detect: Per-based Thaumatology, or Perception + Magery for mages, at -6.
Circumvent: Automatic (don't touch the unicorn's horn).
Effects: Resist Steal Energy-15 with HT or lose 2d FP.