Dragonecro Nethersoul Dragon

2 Zombie monsters Must first be Fusion Summoned. Monsters cannot be destroyed by battle with this card. At the end of the Damage Step, if this card battled a monster: Change that monster's ATK to 0, also, if that monster is still face-up on the field, Special Summon 1 "Dark Soul Token" (Zombie/DARK/Level ?/ATK ?/DEF 0) with the same Level/ATK as the original Level/ATK of that monster. You can only control 1 "Dragonecro Nethersoul Dragon".