Build a ruined runic gateway to the...

Build a ruined runic gateway to the End, maximum 20 blocks wide, 12 deep, and 18 tall. Create an ancient fractured arch with unequal pillars, missing upper sections, jagged breaks, and scattered fallen stones. Keep a clear walk-through opening. The gateway is weathered and partially collapsed, but its magic remains active: glowing violet runes, a faint portal veil, and a few suspended fragments following the broken arch. Use a restrained blackstone and deepslate palette with sparse purple glass and crying obsidian accents. Shape carved edges with stairs, slabs, and walls. Make it mysterious and powerful, not a clean symmetrical portal. No giant platform or surrounding buildings.