Generate a dangerous ruined Nether ...

Generate a dangerous ruined Nether portal structure in Minecraft. The portal should look ancient and partially destroyed, with broken obsidian blocks and missing corners. Around the portal place netherrack, magma blocks, fire and cracked stone to make the area look cursed and aggressive. Add lava leaking from the ground and some dark blocks like blackstone to give it a darker atmosphere. The portal frame should be uneven and damaged, like it exploded long ago. Make the structure look more intimidating and chaotic than a normal ruined portal, like a place where powerful mobs could spawn.