Its a tomb that noticeably does not interact with the graveyard in any way, but its a tomb nonetheless
The original text of Cortexic Jellyfishs first ability is unclear, and there are different possible interpretations of it Whenever Cortexic Jellyfish attacks, it doesnt untap during your next untap step. Cortexic Jellyfish doesnt untap during your untap step. Cortexic Jellyfish doesnt untap during your untap step if it has attacked while on the battlefield. Although the last option is the most complex, and doesnt fit well into existing Magic card templating (with the possible exception of Palladia-Mors, the Ruiner)
Monument is an insane engine alongside The Underworld Cookbook and Ovalchase Daredevil
Long term players will be familiar with the mechanic of transforming from a human form on one side to a werewolf on the other, but the new global day-night cycle offers a significant twist, meaning that a card can enter play as a werewolf if its nighttime
Whenever one or more +1/+1 counters are put on this creature, exile up to one other target nonland permanent until this creature leaves the battlefield