Sidisi, Undead Vizier is a rare Legendary Creature — Zombie Snake card from The List (PLST), collector number DTK-120. Current market price: $12.03, TCGplayer market prices via Scryfall.
Deathtouch Exploit (When this creature enters, you may sacrifice a creature.) When Sidisi exploits a creature, you may search your library for a card, put it into your hand, then shuffle.