magic bonusses to mages

[mr_Logic]

besides the obvious bonusses (such as att skill for fire and undead command for death magic) there are also a few inexplicit bonusses such as +5 command, increase in heat aura and a penalty of 4% in max age for fire, increase in cold aura for water and increase in fear for death.

can anyone complete that list?

also, the explanation at nature magic says it boosts regenerative powers, but my great mother didnt regenerate any faster by increasing her nature magic, so i take it then they only mean your healing spells are more powerfull at more skill in nature magic?