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				Folket said: 
If you are a blood nation you probably want to research blood anyway even if it is very few combat spells.  
			
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 There are much fewer blood nations than non-blood nations, so I'd think Life for a Life could as well be a national spell for them - it's just as unreachable for most nations. For those nations that want Blood 9 any way, it is indeed good, but for everyone else Evocation (or some other school) provides better choice of damage spells against an Aegis-wearing pretender.