Unholy Annex // Ritual Chamber Phyrexian Arena, but with a significant upside (you don't even need to lose life!)
Crystals are usually depicted as being sentient and will even be able to speak with the user, in a gameplay technique that allows the narrative to continue moving forward
Nicholas Byrds Modern Open-winning version gives us an idea for what might be cut, with only three Pentad Prism (among other cuts, like Laboratory Maniac in the sideboard)
From a financial perspective, I'm impressed by the value proposition the product offers, along with the wide variety of cards and treatments included
Robust after-sales support, including clear return policies and responsive communication channels, is essential for resolving potential issues efficiently
Then, if you want to be extra spiteful, you would put in a Ravages of War as well, effectively having two copies of Armageddon in your deck and overriding the format's singleton rule