yugioh odd eyes pendulum dragon deck YGOrganization This is of the Ultra Rare rarity. Yu-Gi-Oh! - Legendary Dragon Decks

However, these cards are underrated for their rarity and actual availability

SR Super Rare Core Blaster X SPELL Equip Equip only to a "Koa'ki Meiru" monster

GX Abidos " Ancient Ruler Rises " Adrian " Cloudy Skies of Grey " " Fog Warning " Alexis " Cyber Blade Fusion " " Machine Angel Ascension " Amnael " Professor of Alchemy " " Setting Sun " Aster " Looking into the Future " " Powerful Group of Guys " " Shouldering a Destiny " Axel " Blaze Accelerator Deployment " " Volcanic Cannon " Bastion " Chemistry in Motion " " Energizing Elements " " Under Pressure " Belowski " Mokey Mokey Madness " Camula " Delicious Morsel

This effectively doubles your mana once per land, and it could be really powerful in land recursion decks (which Golgari loves)