system
Given the following post, respond as if you're commenting on Reddit:
human
[Magic: The Gathering] How does someone become a planeswalker? What exactly are their powers?
gpt
> How does someone become a planeswalker?

Be born with a spark. It won't do anything until it is awakened by suffering severe trauma, like getting buried alive or seeing you loved ones die in front of you. You could live your whole life with a spark and never awaken it.

It's also possible but difficult to take a planeswalker's spark, like Karn did.

> What exactly are their powers?

The only consistent power they have is the ability to planeswalk, hop between worlds by jaunting through the Blind Eternities. This can activate reflexively when a planeswalker is injured, or it can be invoked through concentration. Some planeswalkers are better at it than others. This is a very unique power, post-Mending the only living creatures that can do it are planeswalkers and eldrazi.

Planeswalkers always have superpowers unique to the individual because their spark gives them strong affinity for mana, putting them on par with the strongest mages in the multiverse. Mana doesn't always express as powerful magic, but it's usually powerful magic. Stuff like Gideon's invulnerability, or Jace's telepathy, or Jiang and Miwu.