If i understand, the M'kraan Crystal is the point where all the universes (and pocket-universes) are pinned together to form the Multiverse ?
Oh my : The Multiverse is a children play...
Well, if the guardian need to have the power to repel all possible attack in EACH universe, possibly more than one at the same moment (infinite number of universe : Heavy risk), they need the power to do that.
But we don't know if a guardian exist on each universe simultaneously, or if each universe has his own guardians.
And we don't know if the guardian speak true. Why all vs debaters alway think when a character say something, it's not only true, but the exact thing ?
Abstract ? I don't think abstracts WANT to attack the crystal guardians : They are IN the Multiverse. Even Eternity/Death/Oblivion/Infinity are part of the Multiverse (if we forgot the "death out the universe" shit in The End. I have already talked of my theory). If the universes are destroyed, abstracts too.
If we follow the second guardian hint, the third guardian is one million time more powerful than the first, and the first is already more powerfull than Gladiator, who is more powerfull than a X-Man (but it's possible he attacked Gladiator in a sneaky way).
The problem is : I don't think the "1000 x more powerful" is other thing than character talk. For me, the guardian just say "i'm a lot more powerfull than the first, and a lot less than the third".
But well, say "one million" more powerful that a being who is more powerful than Gladiator...
I don' t know the powers of a guardian, but...
First thing, Guardians are not tactical genius : Attack intruder with one guardian after the other is just... classic Mad Scientist Weakness. Sneaky or intelligent characters can overcome them easily, maybe even without battle them.
Two, they are perhaps "one million powerful", but not on all their skills. For example, the second guardian is slow (X-Men can hit him easily, and he miss them).
I don't know the exact number of guardians, but if the third is the last, i think of :
1° Superman One million ;
2° Ion ;
3° Batman ;
4° Magneto ;
5° Prof X ;
6° The Flash ;
7° Mandrake (first incarnation. Think to the original Strange who know how to use magic without limit to crimson band and blasts).
