I used the magical wood from this mod to create a tool from Tinkers' Construct, then I put 5 reinforcements in the tool, which made it unbreakable, the problem is that the magical wood has the "Magically Brittle" trait, which has a chance to break it every time it is used.
Then, as soon as it breaks an unbreakable tool, it can't be repaired anymore because it is broken "with durability", and Tinkers' tools can only be repaired when they have no "durability" left.
I used the magical wood from this mod to create a tool from Tinkers' Construct, then I put 5 reinforcements in the tool, which made it unbreakable, the problem is that the magical wood has the "Magically Brittle" trait, which has a chance to break it every time it is used.
Then, as soon as it breaks an unbreakable tool, it can't be repaired anymore because it is broken "with durability", and Tinkers' tools can only be repaired when they have no "durability" left.
Minecraft: 1.12.2 Forge: 14.23.12587 Mantle: 1.3.1.21 Tinkers' Construct: 1.12.2-2.9.0.55 Tinkers' Tool Leveling: 1.12-1.0.3 Extra Utilities 2: 1.12-1.7.2
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Maybe setting the "durability" of the tool to 0 when the "Magically Brittle" trait breaks it would fix this?