You could make biomes on the overworld where meteorites have crashed, leaving ores from other planets (and meteoric iron.)
The biome would be a few chunks in size, more or less barren and crater-like in appearance, with visible meteorite remains, and maybe space mobs could spawn around it at night.
And maybe there could be little placed objects in the area (placed in the way grass is placed on a block) that were "pebbles" or "debris" or something and when you break them you could get 1/9th or 1/4th of an ingot worth of meteoric iron dust, which you could then craft together and smelt.
(Credit goes to my friend Kenneth for most of these ideas \m/)
The biome would be a few chunks in size, more or less barren and crater-like in appearance, with visible meteorite remains, and maybe space mobs could spawn around it at night.
And maybe there could be little placed objects in the area (placed in the way grass is placed on a block) that were "pebbles" or "debris" or something and when you break them you could get 1/9th or 1/4th of an ingot worth of meteoric iron dust, which you could then craft together and smelt.
(Credit goes to my friend Kenneth for most of these ideas \m/)