ToME: the Tales of Maj'Eyal

Mold talent\symbiant power?

[NAME]Phosphorescent Fungus (2 or 3 tiers)
[DESC]Summons a fungi with glowing properties, its glow lights up 1 square.
Investing in this will make the radius increase. It does not occupy any spaces, but merges with the background (becomes a dungeon feature, not a npc)
if it has a lvl 3, the pc will have an extra +1 light radius

basically good for seeing monsters approaching you.

Ahh I like the idea of something that grows into the terrain.

More such ideas would be nice