Hey if you want to Search for some Offsets but you can't attach Cheat engine with tera then do this:
1) Start Tera.
2) Start Cheat Engine.
3) Click on "Edit" -> "Settings" in the Cheat Engine GUI.
4) Click Debugger Options.
5) Tick "Use VEH Debugger"
6) Tick "Use hardware breakpoints
7) Tick "Pool for threads"
Done! Now simply click "OK" and attach to Tera. If you attach the Debugger it will not crash the game client Enjoy!