That  Epitaph is a clear depiction of surrealism, juxtaposition is one of the defining features of surrealism, and it has been used in this poem, we can see the two contradictory situations in which he states that he is dead and alive, these two are entirely different terms which are juxtaposed. Surrealism deals with dream and reality and in this poem, we can see that there is a dream about that age in which he had lived for a thousand years and making this picture a depiction of reality that is the feature of surrealism in which dream and reality fuse together. It does not deal with rationality just like he says

 'Am dead'  'I lived' these show irrational thoughts of the poet.

The next juxtaposition is 'All human nobility being imprisoned' with 'I was free among masked slaves', these are two opposite situations in which he excludes his identity from all human nobility. Although he lived in the age of slavery where oppression can be seen but his freedom in that age is the reverse situation. So there is a reversal of the situation.

The next irrational thought writer has depicted is of the earth the sky foiling around him and maintaining their equilibrium, the idea is over-exaggerated to express the thought that a writer wants to depict.

At the end of the Epitaph, he is questioning about the struggle of that age in which he struggled and lived, this questioning is a sort of sarcastic and opposite at the same time because he just breathed and rebelled; this rebellion was against those slavish rules, not lived as he was supposed to just like others because in the earlier lines he stated that he never regards the rules of that slave society where everything seems to be violent. The juxtaposed situation can be seen over here. 

At the end of the poem where he says 'you living, have no fear of me, I am dead' he expects from the people living that you must have fear of me because I am dead and gives the thought of elimination of everything that exists in life, so we can see life, death, and destruction of his own identity. This is one of the features of surrealism in which reality fuses with a dream, it seems like his dream where he is describing his thoughts. In this poem, there is no connection of thoughts that is the prime feature of this movement.