Using Puncture with World Splitter equipped seems to semi-permanently increase the aoe of some skills with "area" tag. The bug persists between monolith echoes but not floors of a dungeon. There is no time limit, and maybe no size limit, though the increase in size slows down the bigger the aoe gets.
Puncture does not appear to benefit from the size increase, and instead it acts like the size increase gets stolen by other skills.
Unequipping World Splitter does not remove the size bonus, so you can use other weapons with the turbo AOE. This does stop the size from continuing to grow, and just keeps it at wherever you stopped,
Shrines also benefit from the bug, and maelstrom for example gets gloriously huge, bigger than the screen.
Sorry if this has been reported already, and doubly sorry if it hasn't and I just exposed your beautiful build/exploit! u/ekimarcher let me know if you need any more info.
Imported charac...