>>107159901>>107159984MTG has its "Earths" as Planes. Each plane is the setting for various stories and gameplay. The latest plane is a revisited planet-wide city called Ravnica; currently ground zero for MTG's "Infinity War".
Each plane has themes like weebs, (Kamigawa), murder robots (Phyrexia), pirates and dinosaurs (Ixalan), a 24/7 Halloween town (Innistrad), dragonland (Tarkir), real-life inspired gods of Egypt, Greece/Rome (Amonkhet, Theros for both cultures?), Dominaria (MTG's Earth-0), etc.
Planeswalkers are beings who can do a Barry Allen and "planeswalk" from one plane to the other. They have the spark, which are activated like a metagene, through trauma or intentionally induced iirc. Planeswalking eventually caused rifts, similar to a Crisis-level event.
Back in the old days, planeswalkers are basically immortals who had to give up their spark, others their lives to close these rifts.
Rifts essentially cause the Planes to disintegrate into the Blind Realities (The Bleed). The Blind Realities separate the Planes from one another. There are creatures who live here called the Eldrazi (The Gentry, Hyperflies). There are 3 Eldrazi Titans that whenever they manifest themselves unto a plane (Zendikar is their favorite), their "shadow" manifests as different creatures, similar to our fingers are just part of one hand in a higher dimension (Final Crisis, Superman Beyond, Action Comics New 52).
Some time after the major rifts were closed, one planeswalker schemed his way unto this week's latest story where he wants to trap all the planeswalkes in one plane and steal their spark so he can become godlike again (Think Darkseid but a dragon:
>>107159863).