in-game description:

fire does extra damage to the dude burning

ice damages stamina and slows enemy down

shock inflicts mana damage as well

i couldnt compare fire part with two enemies stuck together getting flamed too hard, but ive.used ice and hardly noticed difference in speed.

i used ice shard to saber tooth tiger and lydia. both didnt sloe down at all, but i remember when i was playing my warrior class getting shot by thr very same spell slowed me down substantially.

same suspection for shock. i nevet saw enemy mage suddenly stop using magic alltogether when hit by my shock spell. they just keep hurling magic at me. wtf. im just apprentice level now so thought levelling.my destruction could change this. any first hand experience?