[shasarak]

Blue: breathe underwater, create ice barriers, freeze water for non-flying companions to walk across, summon rain/hail (which might damage a fire elemental or extinguish torches at night), turn earth/soil/dirt to mud, resist frost.

Red: fiery projectiles, barriers of flame, obscure vision with smoke, evaporate rivers and lakes, resist fire.

Black: invisibility and/or hide in shadows, become intangible, drain life, possibly necromantic things (like animating zombies).

Gold: turn/dispel undead, create light, healing (or various curative powers, e.g. curse disease or poison), summoning of angelic beings.

Silver: warp or reshape armour and weapons to make them unuseable or create defensive barriers, deflect arrows, enhanced natural armour and weaponry compared to other colours.