Blood Moon is great for stopping powerful land-based strategies like Dark Depths or Mazes End and turning off more basic cards like Evolving Wilds
Mostly, this gives you a Zombie at the end of your turn if you lost 2 or more life, and losing life on your own turn isnt something that will just happen -- youll have to create situations to make that part work, and even though Black is always capable of doing that in Limited, it is highly unlikely you get a critical mass of those cards going that allows you to consistently make a Zombie, and you probably need to get at least two out of this for it to feel worth it

Chaos Orb Falling Star Shahrazad Restricted Cards Ancestral Recall Balance Black Lotus Brainstorm Chalice of the Void Channel Demonic Consultation Demonic Tutor Dig Through Time Flash Gitaxian Probe Golgari Grave-Troll Gush Imperial Seal Karn, the Great Creator Library of Alexandria Lions Eye Diamond Lodestone Golem Lotus Petal Mana Crypt Mana Vault Memory Jar Mental Misstep Merchant Scroll Minds Desire Monastery Mentor Mox Emerald Mox Jet Mox Pearl Mox Ruby Mox Sapphire Mystic Forge Mystical Tutor Narset, Parter of Veils Necropotence Sol Ring Strip Mine Thorn of Amethyst Time Vault Time Walk Timetwister Tinker Tolarian Academy Treasure Cruise Trinisphere Urzas Saga Vampiric Tutor Vexing Bauble Wheel of Fortune Windfall Yawgmoths Will
And this is on top of the 3 ink you spent to play this item
"I knew immediately that I had to do it, I had to make a deck with the cases." As is probably clear by now, Huggins built this novelty, jumbo-sized deck primarily to get a laugh
All of the cards shown in the packs of this article will be there, as well as Wizards of the Coast's official image gallery once it's updated tomorrow