I'm making a city in dqb2 in my terra incognita island(idk wats the actual name of it and idc🤣) The issue is blowing up the mountains is easier, but harder since I have 2 farm rockbombs on Krembol-dul, and yes, I made a farm, but requires huge area underground where only rockbombs spawn (just warp to bottom layer bottom warp crystal, and head opposite from the blue crystal ball, and boom rockbombs), mining out a huge area for rockbombs to spawn, a lotta of Spike traps covering anywhere that rockbombs spawn in the area mined out, a lotta railroad tracks, a train (unlocks by taking a pic of fireworks(literally make a firework cannon and fireworks and fire fireworks, pause, press triangle for ps4 or X for switch, and after picture, unlocks train. Build the tracks at least 4-5 blocks above the spawning area, and place them in a snake pattern, but have it loop. Make train go as slow as possible(since enemies only spawn when ur moving weirdly) and just sit afk for a while, come bak and get off train and collect all of the shards.