This bug cost me the game and ranks.

The opponent cast outrageous robbery and one of the cards was Aclazotz, Deepest Betrayal. He then cast the Aclozot, I destroyed it with either a bitter triumph or go for the throat. When the creature died it did NOT come back transformed under its “owners” control ME. It’s my card I own it. He then proceeded to retransform it and kill me with it eventually.