Astral Breaker
Insert overthinked lore stuff here.
It can be created in a Crafting Table, via shaped recipe:
When mining a block that breaker is effective on, it will break additional such blocks in 3x3x1 area centered around the broken block, orientated respectively to the player's sight. This effect will not trigger if they are holding Shift, however, allowing to mine individual blocks if it's required.
Astral Breaker has a harvest level of 4, which usually means that it can harvest any blocks Diamond Pickaxe can. It also has 4000 points of durability and breaking speed similar to that of Etherium tools.
The Astral Breaker serves as a multi-tool, being effective on any blocks that Etherium Pickaxe, Etherium Waraxe and Etherium Shovel are effective on.
When breaking any blocks, it also leaves flame particles in their place. This effect is purely visual and doesn't seem to affect anything.