Once per turn, if you control no monsters: You can send 1 card from your hand to the Graveyard, then activate 1 of these effects. Target 1 Zombie-Type monster with 0 DEF in your Graveyard; Special Summon it. Target 1 of your banished Zombie-Type monsters with 0 DEF; return it to the Graveyard. You can only activate 1 "Shiranui Style Synthesis" per turn.