[@Bright_Ops] Welcome back, hombre!

Demigods can nab domains and portfolios just like gods:

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One of the uses of Might is, as has been mentioned, to adopt more (Portfolios) for oneself and even Domains. Once a god reaches the required level, carries out the required actions and have the Might to spare, they can add a portfolio. 
The following are the requirements in order to add a (Portfolio):
A god must have used at least 3 Might points in the specific (Portfolio) before they are eligible to adopt it as theirs. For instance, a Water (Oceans) god who wishes to incorporate (Rain) into their (Portfolio) must spend 3 Might points on (Rain) related actions before they 'unlock' (Rain) as a portfolio which they can add.
A god must spend another 3 Might points in order to incorporate the (Portfolio). So, the above god spent 3 Might points on (Rain) related actions, now they need to spend another 3 Might points to incorporate it, just as they spend Might to level up.
A god cannot incorporate a (Portfolio) which is not within their Domain. So, a Fire-type god cannot incorporate (Rain) as a (Portfolio).
Each (Portfolio) requires 1 Level to sustain it. For instance, a Level 1 god cannot sustain any more (Portfolios) than they have. At level 2 they can add a new (Portfolio). So, before being able to add a new portfolio, a god must reach level 2 and fulfill the above requirements, then they must reach level 3 to add another and have fulfilled the requirements and so on.


These are the rules regarding portfolios. Domains are as follows:

A god must have used at least 6 Might Points in the specific Domain before they are eligible to adopt it.
A god must spend another 6 Might in order to incorporate the Domain.
A god cannot incorporate a Domain which is a natural opposite to one of their existing Domains. For instance, a god with a Water Domain cannot then incorporate Fire. Earth cannot incorporate Wind, Light cannot incorporate Darkness and so on. If you are unsure whether a Domain is a natural opposite to one of yours, PM a GM or ask in the OOC.
Each Domain requires 7 Levels to sustain it. So once a god reaches level 7, they can only sustain 1 Domain, the one they already have. Once they reach Level 14, they can add another, and so on.
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Also remember that, amongst gods or demigods (not necessarily both at once) there may be no clashes of ownership of portfolios and domains. See the errata in the 0th post for the full passage.