"El As Del Toro"

Does this phrase make sense?

Does it look authentic?

And how would it be interpreted?

I'm trying to come up with an annagram that makes use of these letters, without being hoaky or strange.

Gracias!

I hoped it could mean something like "King of the Bulls" or "Master of The Bulls".  Maybe like an ace bullfighter, or just the meanest bull itself.

I thought I understood "El As De La Sierra" to mean something like king of the mountain.  Does it? 

Hoped to follow suit with my phrase, but bulls and mountains are different things, so maybe it just doesn't work.  

Greetings.