Sidisi, Undead Vizier (120) [Promo Pack: Theros Beyond Death] Mystery Booster You must also offer monsters

You must also offer monsters whose total Level Stars equal 6 or more as a Tribute from the field or your hand

" Beta The Magnet Warrior" and "Gamma The Magnet Warrior" from your Graveyard

the Fusion Material Monsters that are listed on a Machine-Type Fusion Monster Card

if Clockwork Avian attacked or blocked this combat

and it isn't legendary if that permanent is legendary

Sidisi, Undead Vizier (120) [Promo Pack: Theros Beyond Death] Mystery Booster You must also offer monstersSet: Dragons of Tarkir Promos Type: Legendary Creature Zombie Naga Rarity: Rare Cost: {3}{B}{B} Deathtouch Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Sidisi, Undead Vizier exploits a creature, you may search your library for a card, put it into your hand, then shuffle.