Is it possible to redirect damages that are self inflicted?

I play a HE/Lizardmen deck and I want to use the Temple Guard to redirect to a Carnosaur R the damage that a Dreamer of Dragons dealt itself paying the cost to activate its ability. The trick is that if I pay only 1 ressource for the Temple Guard's ability, I could activate twice the Dreamer of Dragons' ability to trigger twice the savage ability of the Carnosaur Rider. 6 damages for 1 ressource is one hell of a deal.

Since the Dreamer of dragons card text says: "This unit takes 1 uncancellable damage..." instead of "is dealt 1 uncancellable damage" I don't know if the Temple Guard ability is triggered.

Is it right to say that If the damage can be redirected, the Dreamer of Dragons' ability would not be activated since the cost wasn't paid (it did not receive the damage)?

In hoc signo vinces said:

Yes, you are right.

The use of "takes" damage is just to indicate that the source of the damage is itself. (Rules Summary - Arrer Boyz) So it still triggers the Temple Guard ability. The damage is uncancellable, but redirection is not cancellation, so thats fine. But the "if it does" part of the Dreamers ability prevents him from gaining the power.