The iron gate unlocked at level 42 of the construction category is large enough to accommodate large creatures such as Palu, and requires 10 metal ingots and 1 bag of cement to build.
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In the Building category, new building options are unlocked once you reach level 42.
Even the larger Parlu
It’s also easy to walk through the wide metal gate.
Materials required:
10 metal ingots
1 bag of cement.