Gravekeeper's Headman [SOFU-EN012] Rare Sealed Product it gains 400 ATK during

it gains 400 ATK during the Damage Step only

except "Gouki Suprex"

Set: Shadows in Valhalla Card type: Synchro/Effect Monster Rarity: Super Rare Attack: 2000 Defense: 1000 1 Tuner + 1 or more non-Tuner monsters This card can make a second attack during each Battle Phase

Set: Legendary Duelists: White Dragon Abyss Card type: Ritual/Effect Monster Rarity: Ultra Rare Attack: 4000 Defense: 0 You can Ritual Summon this card with "Chaos Form"

Set: Star Pack VRAINS Card type: Effect Monster Rarity: Starfoil Rare Attack: 2000 Defense: 1000 When this card is Normal Summoned: You can target 1 other Cyberse monster you control

Gravekeeper's Headman [SOFU-EN012] Rare Sealed Product it gains 400 ATK duringSet: Soul Fusion Card type: Effect Monster Rarity: Rare Attack: 500 Defense: 1500 If this card is Summoned: You can target 1 Level 4 Gravekeeper's monster in your GY; Special Summon it in face up Attack Position or face down Defense Position. You can only use this effect of Gravekeeper's Headman once per turn. This Effect is unaffected by "Necrovalley".