ToME: the Tales of Maj'Eyal

Harmony
Resolve: Confusion Resist and +Mental Save
Cleanse: Removes one detrimental status effect from the target each turn for 1 + TL turns.
Soothe: AoE daze centered on the caster.
Harmony: Gives bonuses based on what type of tile you're standing on. Grass +Life Regen, Stone + Physical Damage Resistance, Water + Movement Speed, Lava + Fire Resist.

Zonk had another thought, a tree without prereqs like the weapon combat tree with different aspects. Each aspect would be sustained and you could only have one active at a time.

Examples.

Aspects of Nature Tree
Forest -
Rain -
Land -
Sky -

Also these might not be appropriate for Wyrmics and Summoners to start with but here's some generic druid trees.

Domain/Desert (generic/mastery)
Blistering Sun: Lights an area and inflicts (weak) fire damage. (ranged large radius AoE)
Snake Charmer: Sustained. Aura that charms snakes in radius X and gives the player poison resist.
Desert Sting: Sustained. Adds poison damage to your melee attacks.
Call Desert Spirit: Adds to the players light radius, friendly creatures inflict fire damage when struck, creates a fire resist aura.

Domain/Forest (generic/mastery)
Tree Stride: Step into an adjacent tree and out of another target tree with in range. (Tree based teleport. Needs Sprout to be effective in non-forest dungeons).
Awaken: Animates a tree (destroys tree tile and replaces it with an Ent type creature, again needs Sprout to be effective in non-forest dungeons).
Sprout: Creates a permanent tree tile. Range increases with talent level.
Call Forest Spirit: Spirit that can charm animals, grants the player animal esp, and creates a nature resist aura.

Domain/Lake (generic/mastery)
Fog: Breaks LOS
Healing Waters: Cures 1 poison and 1 disease each turn for TL turns.
Rushing Wave: 3 tile wide slow moving knockback.
Call Lake Spirit: Lake spirit grants player water breathing, puts off a cold resist aura, and can ‘stuff’. Ranged Spirit.