View source for Marloss gateway/doc

Somehow related to:
* [[Guide:_Mycus|We Look Here]]
* If you have this mutation, you have crossed the [[Marloss]] [[Mutation#Thresholds|threshold]], which allows you to get the advanced marloss threshold mutations. This also locks you out of all other not-marloss threshold mutations.
* {{spoiler|Eventually the marloss mutations will give you access to the [[Mycus (Mutation category)|Mycus mutations]]}}