[quote=@Genni]
To put it simply, yes.

I've no problem with using 2 Skill Points to reduce the cost of a power by 1 Energy, to a minimum of 1. You wouldn't be able to reduce it further than that though, as you'd still have to keep the skill as a triggered Ability rather than a free Trait.

Using the points this way rather than dumping them all into Defence would also give you the option of having higher Attack if you needed it, rather than being stuck with high Defence and not being able to help with tougher opponents.
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Question: I haven't used metamorphic rock since getting it, can I recycle the unused ability for 2 points to knock rock skin down in cost and i'll add some more points to keep cheapening it. I'm thinking to spend 6 points to drop rock skin from 6 to 3, equal to metamorphic. I'll spend 2 points to gain the police armor as a trait like bumblebee did or I was thinking of either taking up the gasmask as a trait, good for a defender to reduce available status effects from hurting him.

I was also thinking of acting on his newly revealed firefighter history and taking a 'fireproof' trait of somekind.