You can use "Super Polymerization" to Fusion Summon monsters that can normally only be Summoned with "Dark Fusion". Each of the following Skills can only be used once per Duel. • Lose 2000 LP, then change the Type of 1 Special Summoned monster your opponent controls to Rock. • Discard 1 card, then add 1 "Dark Fusion" from your Deck to your hand.