In his desperate quest to seek the truth of the creation Krona arrives to the Marvel Universe where the Grandmaster intercepts him when he tries to send more probes back through time and proposes a deal: that they play a game, and if Krona wins, he will be led to the one being in that universe who has witnessed creation, the Mighty Galactus. If he loses, Krona has to spare the Grandmaster’s universe. Krona accepts, and the players are chosen;
The Grandmaster choose his longtime adversaries the earth mighties heroes, The Avengers are selected to fight on Krona’s side, and the JLA from Krona’s home universe will oppose them.
He informs the JLA that they have to gather twelve items of power (six from each universe) 
the 12th is The Evil Eye of Avalon is a power object that can manipulate & disintegrate matter, project blasts of concussive force, laser-like and disintegrating rays, and create or destroy  force fields, It also possesses dimensional and time  travel powers.

List items

  • In the DC Comics universe the Spear of Destiny is used to explain why WWII era superheroes did not end the war in a short amount of time (by, for example, flying to Berlin and capturing and killing the Nazi leadership). In the comics, the spear had been found by Hitler and was used in a mystic spell which would cause the most powerful Allied superheroes to come under his control if they entered Axis occupied lands.

  • Is a radioactive meteorite called the Orb of Ra, tha transformed Rex meson into the elemental man!

  • Psychopirate's Medusa Mask, These golden masks bestow upon the wearer the power to project emotions onto others.

  • The power source of the green lantern rings! In this case Kyle Rayner's one.

    These batteries are directly linked to the Central Power Battery on Oa and do not themselves need recharging.

  • the Green Bell of Uthool, the Silver Wheel of Nyorlath and the Red Jar of Calythos.

    Anyone can summon the power of the Demons Three by possessing (and utilizing) three artifacts: the Green Bell of Uthool, the Silver Wheel of Nyorlath and the Red Jar of Calythos which were created by the brothers for this purpose and could not be destroyed or moved from Earth, meaning the Timeless Ones created magical guardians for them.

  • Merlin's spellbook known as Book of Destiny. appear in Demon # 1. The Book of Eternity contains the story of existence. It gives the controller vast magical powers.

  • The Ultimate Nullifier has been described as "the universe's most devastating weapon."[2] As such, the Ultimate Nullifier has the ability to completely eliminate any target the wielder chooses, along with the user if his or her mind is not focused enough.[2] In the hands of a being with an extremely powerful mind the Ultimate Nullifier can destroy (or in conjunction recreate) entire time-lines from beginning to end.

  • An Asgardian relic and the greatest weapon of Malekith the Accursed. When opened, it can reproduce the infinite icy cold of Niflheim. Later entrusted to the care of Edwin Jarvis, butler to the Avengers, by Thor. Causes its holder to grow younger gradually.

  • It comes from the hyperborean age, The Wand is controlled by the thoughts of the wielder, and can used to project and absorb mystical energy; create forcefields; control weather; open dimensional portals; observe events in other locations and heal wounds.

  • Infinity Gems, sometimes referred to as the Soul Gems, are six immensely powerful gems featured in the fictional Marvel Universe. Whoever holds all six gems in the Infinity Gauntlet gains omnipotence, omniscience, omnipresence, and God-like power, and has absolute dominion over the universe

  • The first Cosmic Cube was established as a device created by A.I.M. and capable of transforming any wish into reality, irrespective of the consequences.