If a Zombie Synchro Monster(s) is Special Summoned, except from the Extra Deck, even during the Damage Step: You can apply 1 of the following effects. You cannot apply that same effect of "Mayakashi Mayhem" for the rest of this turn.
●Draw 1 card.
●Set 1 "Mayakashi" Spell/Trap directly from your Deck, except "Mayakashi Mayhem".
●Send the 1 monster with the lowest ATK your opponent controls to the GY (your choice, if tied).
●Inflict 800 damage to your opponent.
You can only activate the effect of "Mayakashi Mayhem" once per Chain.