Vannifar, Evolved Enigma (Serialized) [Murders at Karlov Manor] RT5 You can only use this

You can only use this effect of "Silent Swordsman Zero" once per turn

each opponent sacrifices three creatures

each opponent chooses money

Both players then pick up 5 cards from the top of their respective Decks and Special Summon all Level 4 or lower Monster Cards among them on the field in face-up Attack Position or face-down Defense Position

with killing

Vannifar, Evolved Enigma (Serialized) [Murders at Karlov Manor] RT5 You can only use thisSet: Murders at Karlov Manor Type: Legendary Creature Elf Ooze Wizard Rarity: Mythic Cost: {2}{G}{U} At the beginning of combat on your turn, choose one Cloak a card from your hand. Put a +1 +1 counter on each colorless creature you control.