the dark-gaming server

please tell me what to do cause i went in to get a eternia crystalso i checked and i couldnt find then i used the /i command to get it and it said i got it when i checked it wasnt there then i used the command to get something else and i also didnt get that please help

/item or /i (they both do the same thing, one is shorter for convenience)
Command Syntax:
/item itemname amount modifier
Some examples:
/i terra blade 1 legendary - Gives you one legendary terra blade
/i eternia crystal - Gives you eternia crystals
/i picksaw 1 light - Gives you a light picksaw
If you have anymore questions or issues, the best place to ask would be on the server discord: http://discord.gg/ZuNQUdZ