Power cost 0?

[Sammael]

I'm currently playing a M&M character with a battlesuit, and I'm looking into improving the suit to make myself resistant to sonic damage.

One option is to add Immunity (Sonic), which requires 5 ranks in Immunity, and those 5 ranks normally cost 5 power points. However, I'd prefer having Limited Immunity, due to the prototype nature of my battlesuit upgrade. Limited usually reduces the cost per rank by -1, which means... what, exactly? The book gives an explanation for the situation when flaws reduce the cost below 0, but I am either not reading it right or there is no clear answer as to what happens when the cost per rank is 0. Please help!

 

[Set]

I'm currently playing a M&M character with a battlesuit, and I'm looking into improving the suit to make myself resistant to sonic damage.

One option is to add Immunity (Sonic), which requires 5 ranks in Immunity, and those 5 ranks normally cost 5 power points. However, I'd prefer having Limited Immunity, due to the prototype nature of my battlesuit upgrade. Limited usually reduces the cost per rank by -1, which means... what, exactly? The book gives an explanation for the situation when flaws reduce the cost below 0, but I am either not reading it right or there is no clear answer as to what happens when the cost per rank is 0. Please help!

Immunity 5 (sonic) is treated as 5 ranks of Immunity at 1 PP each. They would reduce to 1 pp / 2 levels with a Flaw (limited), which means you'd pay 3 pp.

So instead of going to cost / rank zero, it goes to 1 pp / 2 levels.

There are even examples of some pre-made powers that cost 1 pp / 2 levels (such as Sorcery, from Warriors & Warlocks, which is a Flawed Fatiguing Magic array) in some of the books.

 

[Elric]

Limited usually reduces the cost per rank by -1, which means... what, exactly? The book gives an explanation for the situation when flaws reduce the cost below 0, but I am either not reading it right or there is no clear answer as to what happens when the cost per rank is 0. Please help!

This is just the Fractional Cost rules on page 110. For the power in question, it's 1 pp buys you two ranks, as explained above.

 

[Sammael]

Thanks for the answers!