2 or more Reptile-Type Worm monsters
For each Fusion Material Monster with a different name used to Fusion Summon this card, it gains 500 ATK, and also gains these effects:
2+: Once per turn, you can select 1 Reptile-Type monster in your Graveyard, and Special Summon it in face-down Defense Position.
4+: You can remove from play 1 Reptile-Type monster from your Graveyard to send 1 monster on the field to the Graveyard.
6+: Once per turn, you can draw 1 card.