Movement Speed Rules Question

[Red Mage]

Hey guys, quick question here.

So character in my campaign has a certain attack which, along with a minor damage roll, deals speed damage. The attack deals 1d2+2 damage AND docks the enemies' by 10 feet. The character has built the strategy of taking 10 feet off its speed per turn until it is rendered motionless, and then the party members back away and shoot it until dead. Is this fair? Does the speed damage stack? Or can he only do this affect once per creature?

Btw - I'm running 3.5 dnd Core rules.

[sreservoir]

we'd have to know what the rules for the specific effect are.

[Claudius Maximus]

It's quite possible that the reductions do not stack, depending on the wording of the effect. We would in fact need to know the specific ability in question.