Wierd Were-Creature Build Help Needed

[togapika]

How can I build a Halfling Were-T-Rex within the rules without using homebrew?

[theUnearther]

Do you mean because of the size difference? There is the Dungeonbred template in Dungeonscape, which makes some animal (and other things) a size smaller, up to medium. Because they're bred to keep dungeons, you see. Assuming it can be stacked on itself, you can end up with a Medium-sized T-Rex, which then can transfer lycantropy to your halfling by however that is supposed to work. It will be a slightly less powerful T-Rex than normal, though.

The other way I can think of is having a were-t-rex whatever breed with a smaller creature until it breeds true, whereupon you breed the child with a yet smaller creature, up until you have your were-t-rex halfling.
But on checking the info on lycantropy, there does not seem to be a provision for this happening.

[togapika]

No ways to temporarily change my size so I can contract the disease?

[Urpriest]

No ways to temporarily change my size so I can contract the disease?

Easily. Expansion, for example, can make the manifester increase by two size categories at level 7 and up. The question is, when you no longer are Large, do you still keep the template? Since some templates change a creature's type such that after the template they wouldn't qualify, this may be allowed...but the rules really don't say anything explicit on the topic, so please talk to your DM.

[togapika]

But for this template, type doesn't matter... The only semi-requirement is that the animal be within one size category of the base creature's size

[Darrin]

But for this template, type doesn't matter... The only semi-requirement is that the animal be within one size category of the base creature's size

A Dungeonbred Cave Tyrannosaur (from the Miniatures Handbook) is medium-sized.

[togapika]

I suppose I could just as easily use the stats for a tyrannosaur animal companion, but the desire here is to be a really small halfling who turns into a really giant dinosaur.

[AlchemicalMyst]

For exactly what you want? No. As far as I know. At least not without a lot of extra work for only temporary effects.

[togapika]

Yeah, I suppose the best I could hope for is to be a medium sized were-tyrannosaur and then enlarge myself while in animal form...