Fossil Warrior Skull Bone

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.