Before he even reached his true potential, Tim spawned a thousand different universes as a subconscious afterthought:
http://i.imgur.com/CIFmqM5.jpg
http://i.imgur.com/N7ujMkE.jpg
(as the second scan states: he also sent a sliver of himself to each one.)
*And to be clear: in The Books of Magic, "worlds" = dimensions/universes:
http://i.imgur.com/YyWkW5j.jpg
A much weaker fraction of Tim's totality destroys one of his realities:
http://i.imgur.com/qn1dguy.jpg
(this scan also confirms that all of Tim's creations were undoubtedly full-fledged universes.)
Additional confirmation that Tim can easily obliterate dimensions/universes:
http://i.imgur.com/iin3UWR.jpg
A future version of Tim is shown killing Spectre, along with every mage on earth:
http://i.imgur.com/yoYK9Uh.jpg
http://i.imgur.com/d0mOcuS.jpg
"That's you, Tim... You as you are now [...] I'm sorry, kid. It already happened."
And as the Merlin, Tim bonded with the 'Song of Creation', which endlessly makes and remakes the whole of existence:
tl;dr
I think Tim can defeat MJJ... Especially as the Merlin.
👆
Tim is the most powerful magic user in DC. I really wish they'd give him a proper series again -- all of his old titles were just fantastic. 👆
Also, you'll note that Tim mentions destroying the "world" in this scan:
Originally posted by Galan007As I mentioned above- in The Books of Magic, 'world' is often used interchangeably with 'universe', 'realm', 'dimension', and 'reality'. Additional confirmation of this can be found at the end of the same series -- Tim and the Faerie Queene once again reiterate that entire universes(not just worlds) were at stake:
Additional confirmation that Tim can easily obliterate dimensions/universes:
http://i.imgur.com/iin3UWR.jpg
Originally posted by Zack MIn the DCnU, Tim's father(who was stated to have LESS potential than Tim himself) froze/immobilized HUNDREDS of magical beings that were actively battling, with a gesture- inc. Deadman, Zatanna, Black Orchid, Frankenstein, and yes, Constantine. Tim and his father then discharged so much magical energy that even Constantine was awestruck by it:
So, Tim>>>>>>DCnU John Constantine?
*Note: even after expending THAT much power, he still unfroze everyone on the field with another gesture. #NowThatsPower 👆
MJJ is a beast. Also warped the entire Omniverse in a Future where he wasn't stopped by the Fury (his only better). Matrix/Merlin was all powerfull concering omniversal space-time, until GOD (MJJ) awoke. Like all would-be GOD types he was given a plot to lose of course. His only true weakness, an already nearly indestructible cat now also immune to his power, that adapts to anything thrown at it, duh.