Not only did the name mean "looking back at the past," it had a mechanic that referenced cards that had already been played
Giving your entire board indestructible blanks most removal and forces opponents to find completely different answers
Many Commander players can struggle with this extreme level of choice, and decision paralysis is something I personally experience often when deciding on decks to build
Illustrated by Deruchenko Alexander Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Rev, Tithe Extractor Price: $40 Mana Value : 3B Rarity : Rare Card Type : Legendary Creature Human Rogue Stats : 3/3 Card Text : Whenever you attack, target creature gains deathtouch until end of turn
On top of this, Unholy Annex naturally plays much better in midrange strategies than controlling ones, and suits Excruciator very well as the card advantage is needed to support a resource-intensive combo and that's before even considering that Excruciator is literally a Demon