Umbral Horror Will o' the Wisp

Level 1 DARK/Fiend Effect
0 ATK / 0 DEF

When this card is Normal or Special Summoned: You can target 1 "Umbral Horror" monster you control or in your Graveyard, except this card; this card's Level becomes the current Level of that monster. When this Attack Position card is destroyed by battle and sent to the Graveyard, and was in face-up Attack Position at the start of the Damage Step: Destroy the monster that destroyed this card.

Rulings – Yugipedia

Printings:

Judgment of the Light: JOTL-EN014 (Common) - 2013-08-08
2014 Mega-Tin Mega Pack: MP14-EN068 (Common) - 2014-08-28

Prices:

Cardmarket: 0.07 €
TCGplayer: $ 0.11