- This is the only monster in all "Yugioh" whose battle damage is considered effect damage caused in battle.
- This card's perfect combo: target Union Attack on this after using Phantom of Chaos's effect treating it as Armityle the Chaos Phantom, "Gravekeeper's Vassal" will have a total of 10,700ATK=10,000ATK + 700ATK. damage will be inflicted because Union Attack only affects battle damage.
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