I heard doomsday has beaten super man ,so he must be pretty strong. 

I'm talking about base sequence zero klien no help from the Sefirah castle ​​,  here is the list of his major abilities :-

Fooling: This is one of the two core authorities of the Fool which encompasses the partial authorities over History, Time, Fate, Change, and Concealment with its corresponding symbol of "Blind Stupidity" within the Mind Domain. Its main effect is turning falsehood into reality.


History: "They" are able to Fool History, separating the self of one second from the next. This allows "Them" to swap the past, present, or future conditions of "Themselves", making "Their" past become the present and vice versa.
Klein Fooled History into swapping "His" past and present condition while in a cage without a fixed "door". The corresponding past state of "Himself" (now as a Historical Projection) was in the cage while "His" present self was outside of it.
Time: "They" can Fool Time, confusing the sequence of events, delaying the effects of Beyonder powers as if breaking free from Time's constraints, moving within a frozen environment through various real or conceptual gaps.

**Reassembly** (**Tampering**/**Grafting**): The authority of **Reassembly**, born from the interplay of the symbols **Change** and **Bizarreness**, forms one of the two core authorities of **The Fool**.

* "They" can directly **Graft** physical objects, entities and abstract concepts—including "Themselves"—that originally had no connection, producing **Inconceivable** yet entirely real effects.
   * The authority of **Reassembly** can directly act on "concepts" and even "authority" itself.
   * The ability, **Damage Transfer**, is a subordinate and specialized application of **Grafting**.
   * Once the **Conceptual Reassembly** is removed, the effects of **Reassembled** objects would immediately end on the spot.

  


  


Klien sequence 0 from (lord of the Mysteries) vs doomsday from (dc)