"Ruined End Portals" as a Rare Underground Loot Structure

We currently have Ruined Nether Portals scattered across the world, but we need an ancient variant for the End dimension. I propose a new rare underground structure called the "Ruined End Portal." World Generation and Spawn Coordinates: - Spawn Elevation: This structure exclusively generates deep underground between Y-levels -48 and 32, hitting the perfect transition zone between stone and deepslate layers. - Structure Design: It uses the broken, vertical rectangular frame style of a ruined portal, but features 0 obsidian blocks in the structure itself. - Environmental Blocks: While the structure has no obsidian, the surrounding cave terrain is corrupted entirely by patches of Endstone blocks that have leaked out into the Overworld walls, acting as a bright visual beacon for miners. Official Balanced Chest Loot: A hidden loot chest is buried within the Endstone blocks. To protect vanilla progression, it never drops Eyes of Ender. Instead, it features thematic alien rewards: - Common (100%): 5-12 End Stone blocks and 1-3 Ender Pearls. - Uncommon (45%): 3-6 Chorus Fruits and 2-5 Obsidian items (obsidian is strictly restricted to the chest loot pool). - Rare Jackpot (10%): A 10% chance for exactly 1 Shulker Shell or a Feather Falling enchanted book. Why this benefits gameplay: It expands Minecraft's ancient lore and rewards deep cave exploration. It gives players a beautiful, mysterious discovery and a small way to obtain Endstone decorative blocks or a single Shulker Shell.