nature only buffs ljos druids ?
doesn't it boost any druid save dwarven ones ?
Nature is very powerful :
forest defense : not always useful, but manytime, having a defender in your stack that has +25% defense just for a measly adept spell is poweful.
poison blade :
-is a given for ranger-beastmaster, assasins, shadows (+1

, it's powerful)
-is also mandatory if you play FOL : fawns and satyr are quite cheap units, for their power.
-beastmasters are one of the more powerful units ingame, no weapon promo so not liable to rust nor weak to lignthing damage, no promotion against recon units...(especially for rasing stacks out of cities) so poison blade is very interesting to have, as much as enchantement.
vitalise : very powerful, but less useful as demanding a lot of micro. genesis works once, vitalise can bring tundras/floodplains into grasslands, not just into plains !!
I agree that vitalize can be done (almost) with genesis, but poison blade is soooo.
shadow :
-blur : fun but not so powerful
-shadowwalk : very powerful mid game when the culture defense is not so powerful. and very powerful when attacking a stupid city with LOTS of longbows
-summoned unit : nice but not so über IIRC.
life : ok I concede the point.
-sancitfy : good for reducing the AC
-destroy undead : fun but rarelly needed. but when you need it, it really is worht the cost;
-resurrection : on graveyard : joke. for hero : nice, but I rarely use it.
chaos
-dance of blade: again, combat wise, one powerful spell.
-mutation : I like it a loooot : it is very powerful but a bit risky : don't do it on your heros, but any other unit is fair game, especially as any priest can remove most of the negative results save "weak", "enraged" and "sensitive to fire" !! those unit you can crash as cannonballs on your next city attack to soften the best defenders so they become tractable for your more powerful units.
-wonder : nice, fun, I almost always get one for the fun.
sun :
-scorch : for getting from ice to tundra : save some vitalise time. allows to build improvements on a former unusable tile
-blind : not used yet.
-aurealis : +2affinity : mega powerful !!!
mind :
-inspiration : very powerful early game. nice late game : adept level spell.
-charm : no use for me
-domination : very very very nice, especially for taking his national units, or some priest I don't have so to make druids with them.