So like the dungeons of Limbo, the Training Grounds will work in the same way. It can be either PvP or PvE, depending on what the characters involved are going for. When posting for a topic in the Training Grounds, make sure to note that a character in the Training Grounds is not able to participate in a challenge until the topic has ended. The character can only be put in one at a time. The character cannot be in more than one Training Grounds topic, either.
When making a topic for the Training Grounds, make sure to specify whether a topic is intended to be PvE or PvP. This will clear confusion and make things run smoothly.
Examples:
Entering the Arena (PvP Only) <-- This would be acceptable.
Entering the Arena (PvP, may be PvE) <-- Acceptable
Entering the Arena <-- Unacceptable.
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Fighting Shadows (PvE, may be PvP) <-- Acceptable.
Fighting Shadows (PvE only) <-- Totally acceptable.
Fighting Shadows (PvP) <-- Unacceptable, you are a horrible person for confusing us all.
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When entering a topic that contains PvE, please send me a PM if you wish to fight Shadows, I will make sure that I make a fight happen for you all. The Training Grounds will be locked until the first challenge is complete, so make sure you don't jump the gun and fill the training grounds with topics.