Fossil Dragon Skullgar
Level 4 EARTH/Rock Fusion Effect2500 ATK / 0 DEF
1 Rock monster + 1 Level 4 or lower monster in your opponent's GY
Must first be Special Summoned with "Fossil Fusion". If this card attacks a Defense Position monster, inflict piercing battle damage. You can banish this card from your GY; add 1 "Fossil Fusion" from your Deck to your hand. You can only use this effect of "Fossil Dragon Skullgar" once per turn.
Fossil Dragon Skullgios
Level 8 EARTH/Rock Fusion Effect3500 ATK / 0 DEF
1 Rock monster + 1 Level 7 or higher monster in your opponent's GY
Must first be Special Summoned with "Fossil Fusion". Before damage calculation, if this card battles an opponent's monster: You can switch the current ATK and DEF of that opponent's monster until the end of that Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled.
Fossil Machine Skull Buggy
Level 4 EARTH/Rock Fusion Effect1400 ATK / 1200 DEF
1 Rock monster in your GY + 1 Level 4 or lower monster
Must first be Special Summoned with "Fossil Fusion". When this card destroys an opponent's monster by battle: You can inflict 600 damage to your opponent. You can banish this card from your GY; add 1 monster from your Deck to your hand that mentions "Fossil Fusion". You can only use this effect of "Fossil Machine Skull Buggy" once per turn.
Fossil Machine Skull Convoy
Level 8 EARTH/Rock Fusion Effect2100 ATK / 1800 DEF
1 Rock monster in your GY + 1 Level 7 or higher monster
Must first be Special Summoned with "Fossil Fusion". While you control this Fusion Summoned card, all monsters your opponent controls lose ATK equal to their original DEF. This card can make up to 3 attacks on monsters during each Battle Phase. When this card destroys an opponent's monster by battle: You can inflict 1000 damage to your opponent.
Fossil Machine Skull Wagon
Level 6 EARTH/Rock Fusion Effect1700 ATK / 1500 DEF
1 Rock monster in your GY + 1 Level 5 or 6 monster
Must first be Special Summoned with "Fossil Fusion". This card can make up to 2 attacks on monsters during each Battle Phase. When this card destroys an opponent's monster by battle: You can inflict 800 damage to your opponent. You can banish this card from your GY, then target 1 Spell/Trap on the field; destroy it. You can only use this effect of "Fossil Machine Skull Wagon" once per turn.
Fossil Warrior Skull Bone
Level 4 EARTH/Rock Fusion Effect2000 ATK / 800 DEF
1 Rock monster + 1 Level 4 or lower monster
Must first be Special Summoned with "Fossil Fusion". This card can make up to 2 attacks on monsters during each Battle Phase. You can banish this card from your GY; add 1 "Time Stream" from your Deck to your hand. You can only use this effect of "Fossil Warrior Skull Bone" once per turn.
Fossil Warrior Skull King
Level 8 EARTH/Rock Fusion Effect2800 ATK / 1300 DEF
1 Rock monster + 1 Level 7 or higher monster
Must first be Special Summoned with "Fossil Fusion". This card can make a second attack during each Battle Phase. If this card attacks a Defense Position monster, inflict piercing battle damage. During your opponent's turn (Quick Effect): You can target 1 monster in your opponent's GY; discard 1 card, and if you do, Special Summon that monster to your field. You can only use this effect of "Fossil Warrior Skull King" once per turn.
Fossil Warrior Skull Knight
Level 6 EARTH/Rock Fusion Effect2400 ATK / 1100 DEF
1 Rock monster + 1 Level 5 or 6 monster
Must first be Special Summoned with "Fossil Fusion". If this card attacks a Defense Position monster, inflict piercing battle damage. When this attacking card destroys a monster by battle: You can activate this effect; this card can make a second attack in a row. You can banish this card from your GY, then target 1 monster on the field; destroy it. You can only use this effect of "Fossil Warrior Skull Knight" once per turn.