Dark Unity (SGX3-ENS09) - Speed Duel GX: Duelists of Shadows 1st Edition

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.