Continuous-like. Continuous-like. Trigger-like. Field. All face-up monsters on the field become DARK. Once per turn, if you would Tribute a monster(s) to activate a card or effect, you can Tribute 1 DARK monster your opponent controls as if you controlled it. Once per turn, during the End Phase: Special Summon as many "Shadow Tokens" (Fiend/DARK/Level 3/ATK 1000/DEF 1000) as possible to the turn player's field in Defense Position, up to the number of monsters that were Tributed this turn while this card was face-up on the field.