Just like Exodia the Forbidden One from "Grandpa's Cards", this skill also serves as an alternative win method. As long as Dark Necrofear remains stagnant in your graveyard for 5 turns after activating his skill after its criteria is met, you will win the game.
Can be used if Dark Necrofear is in your Graveyard, and your LP are at 2000 or below. At the end of your 5th turn after activating this skill, you win the Duel. This skill is negated if "Dark Necrofear" leaves your Graveyard. This skill can only be used once per Duel.
A drop skill obtainable by dueling against Legendary Duelist when using Yami Bakura.
Rating and explanation
This skill is excellent when used with stalling decks and against decks that do not counter cards in the graveyard. However, it may be difficult to pull off the alternative win method as it has many flaws:
You must take at least 2000 damage in order to activate the skill, which is at least half your starting life points.
You can only activate this skill once per duel. In other words, if "Dark Necrofear" leaves your graveyard within the five turns, you cannot activate the skill again. You will not be able to win with the alternative method. Stalling decks that depend on this win method will most likely lose in the situation mentioned earlier.
One example that can shut down this skill is Disappear which happens to be a non-meta card for now.