Upper_Krust
Legend
Howdy Farealmer3 matey! 
I think thats a bit overly harsh, but I think it might nullify their highest level spells.
When in doubt try this. Make their highest ability score 10. Now many characters will have magical items that raise their scores, so this will be 10+ ability boosting item, but it should still make a dent.
Arguable, but probably just the most powerful ability derived from it.
I would say that Superman (and Thors) greatest strength is their strength. So I'd reduce those to 10 (Thor's belt boosting that to 20...still not enough to wield the hammer).

Farealmer3 said:All this discussion on abrogate has given me a question for U_K. First, would abrogate nullify a wizards spellcasting(as discussed above)?
I think thats a bit overly harsh, but I think it might nullify their highest level spells.
When in doubt try this. Make their highest ability score 10. Now many characters will have magical items that raise their scores, so this will be 10+ ability boosting item, but it should still make a dent.
Second, would it abrogate an ability that has multiple uses like silver surfer's power cosmic?
Arguable, but probably just the most powerful ability derived from it.
And lastly, would it abrogate Superman's ability to absorb yellow sunlight or marvel Thor's ability to use his hammer?
I would say that Superman (and Thors) greatest strength is their strength. So I'd reduce those to 10 (Thor's belt boosting that to 20...still not enough to wield the hammer).