1 Dmg to opponent for each creature

All creatures have vigilance. At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. This artifact deals damage to the player equal to the number of creatures tapped this way.

Kicker (You may pay an additional as you cast this spell.) Target player can't cast spells this turn. If this spell was kicked, creatures can't attack this turn.