Having a Replazer is a really useful tool in your building arsenal.
Available when you hit World Level 4, the Replazer allows you to replace blocks, with blocks made of different materials - you no longer have to remove whole walls if you want to turn them from Stone to Wood.
This is an excellent item for the perfectionist, and for those looking to build large structures in a cheap Block type - such as Clay - to a far more expensive one.
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