(Usually) Only Thor can pick up Mjolnir…because he’s worthy.
The Green Lantern ring sought out and accepted Hal Jordan…because he’s worthy.
Could these two…theoretically…switch their respective tools of the trade?
The standards of “worthiness” aren’t necessarily the same.
IIRC, the only DC character who can canonically wield Mjolnir is Superman.
I suspect that Hal Jordan could given his ring to Thor and that Thor could make it work. Thor is probably “worthy”, and handing him the ring would likely at least temporarily supersede anti-theft precautions. It would likely alert the Guardians on Oa in the process though.
The other is harder to say. It doesn’t matter if Thor offers the hammer to someone or not, it makes its own judgement and its standards are obscure. You could justify it either way, really.
Wonder Woman did so in one of the crossovers, but i don’t know how canonical it is.
Thor would be the master of big green hammers.
There was also the street clean-up guy who handed the hammer back to Thor.
I thought the thing with the ring is, it’s less about being “worthy” and more about “yeah, but how worthy?”
Like, yeah. brave test pilot Hal Jordan has enough willpower to do a lot with it — but plenty of guys in that line, disciplined ex-military types who earn a paycheck by staying calm when things go wrong at Mach One, could probably do a decent job of it. As could firefighters of the ‘rush into a burning building’ type — or, y’know, a death-defying circus acrobat turned sidekick to Batman, or whatever.
In which case, you’d expect Thor to be strong-willed enough to ring up something — though maybe with somewhat less oomph than, say, Captain America, or Doctor Doom.
Hal Jordan got his ring because he was fearless. That’s what his worthiness was based on, not being an upright citizen or selfless individual.
Thor could definitely wield a power ring. I don’t think Hal could lift Mjolnir.
IIRC, in the crossover where Superman wielded Mjolnir, after the crisis had passed, he tried again to lift it and couldn’t. Thor explained that, well, obviously the standards for worthiness are context-dependent, and were more permissive when they needed to be (i.e., when nothing but an uru-wielding Kryptonian would be enough).
I’ll bet almost every “switcheroo” was tried during the free-wheelin’ Silver Age. There were SO many cases of someone trying out a wild idea with no concern for continuity.
Heck, Julius Schwartz ('50s /'60s DC editor) was famous for coming up with a crazy idea, having a house artist draw it up as the next cover… THEN giving it to the writer and saying “Okay, write 24 pages to go with THAT!”
(“But, Julie, that’s a just another purple gorilla in a green speedo… but this one’s… choking Superman?”
“Great, isn’t it? Can’t go wrong with a purple gorilla. Now get writing!”)
Not to mention the “Imaginary Tales”. I remember a lot of “Baby Kal-El’s Rocketship Found by Thomas and Martha Wayne!” or “What If Jimmy Olsen Became The Flash?”
What if The Hulk had a Red Lantern Ring?
Red Lantern Ring | DC Database | Fandom
I dunno, the bindings on Mjolnir’s handle look kind of yellowish to me.
Ummm… technically, Green Lantern rings haven’t had their vulnerability to yellow for a long time.
Oh that’s good. That always seemed like a pretty dopey vulnerability to me. I don’t think I’ve read a Green Lantern comic since the 1960s.
Which led me to wonder just how could Hal and other Green Lanters possibly handle Sinestro and other Yellow Lanterns!
Could be worse. Alan Scott, the original Green Lantern, was weak against anything made of wood.
So now we have to give one to Matt Murdock.
…And his uniform becomes a weird patchwork of “Green for Lantern” and “Red for Devil”!
And Matt has no idea how shitty it looks.
There is (or was) a blind Green Lantern named Rot Lop Fan, who had no idea of lanterns, light, or green. His ring used sounds, because obviously images are a problem. As far as he knows, he’s a member of the “F Sharp Bell Corps.” Has his own oath and everything.
Sadly, I didn’t have to look any of that up.
And of course Mr. Rogers picked up Thor’s hammer. He’s worthy, naturally.
And his superhero identity is “Ugly Holiday Sweater Man”.