Alright, team MODA! Let's save this FUBAR situation.
Before it goes full meltdown.
Also, I never really went more into detail about how Oswald's Semblance works, OOC. He doesn't really understand it IC, but this is basically its parameters:
Closer operates on the function of "Instantaneous Movement". Being that my last character, Auriel Connolly, was....grossly overpowered with his Semblance (Called Blink-Instant movement to anywhere within 50 feet in line of sight), I decided to throw some more restrictions on it. As is, Closer can be used to move Oswald instantly to any living creature within 50 feet, arriving about four feet from his target.
I felt that was too broad, and with sufficient bullshittery, could also become vastly overpowered, since there are millions of little bugs all around, and they could be considered "creatures" by some interpretation. So I came up with the restriction of requiring "sufficient biomass." As this is also broad, I included an example in Oswald's backstory (which has obviously yet to be revealed). It's a small bird, about the size of a fully-grown robin. Any smaller than that, and his Aura can't detect it as a living creature.
Which goes on to the question of "How does his Aura know if something is a living creature that is big enough?" Simple answer: No idea, it's Aura, ain't gotta explain shit. But seriously, I dunno. Never could think of a reasonable way to explain that. Too bad. All I have is that his ability 'links' him to that creature for the instant of movement. Once he's moved, link broken. The link is what allows the movement to take place, though it doesn't drain the other thing's life or Aura or anything-just Oswald's, and it won't work if the creature is too small. It's simply a way to explain how it works, even if it's pretty...lackluster.
Another question some may have thought of- "Can it be any creature that's big enough, or does he have to see it?" I decided to go with a middle-of-the-road for this one. Oswald's training to use his Semblance (which has been extensive, for backstory reasons I am willing to explain OOC) is pretty intense. As such, he has a somewhat limited "life-detection" ability around him when he uses his Semblance. It's limited in that he can't detect all life around him, just that his Semblance can 'link' him with another creature if he uses it blindly, but due to risk reasons, he rarely if ever does so.
Additionally, instead of taking the "shortest distance between two points" approach, Oswald can appear anywhere along a four-foot spherical diametric space of his opponent. He typically goes for the sides or the back, for obvious reasons, but sometimes he likes to mix it up and pop up a bit above them too, just to add a little vertical momentum to his attack.
In the instant that he activates his Semblance, Oswald moves to where he chooses to move. The instant. It's not "really fast." If you lined Ruby, Jack and Oswald up and told them to race to a designated point, marked by lasers, and Oswald could move to that spot, he would be there instantly. Hell, if you marked the start with lasers too, he'd be there less than one quadrillionth of an attosecond after he disappeared. (That's 10^-33 seconds, btw). Yeah. You might say that this is overpowered.
It is. But it also comes with a glaring weakness: what happens when two pieces of matter violate the laws of physics and occupy the same space? Well, luckily for Oswald, Aura shielding protects him from the forces that control the Universe, but there's only so much Aura can do.
As Oswald learned the hard way. Teleporting into a gas results in a relatively non-violent negative pressure field developing around him, pushing the air away for the tiniest fraction of a second. Not even long enough to blink, or start breathing. Air is so not-dense, there's not much for his Aura to protect him from.
Liquids are a bit trickier. A liquid would violently burst outward, and drain a relatively substantial amount of Oswald's Aura to protect him from the damage. A dense enough liquid, or if he submerged himself completely, might even result in some nasty splicing.
But solids. Solids are a whole nother matter. While not unilaterally denser than liquids, the way solids are arranged atomically has a really wonky side-effect with Oswald's Semblance- his body disappears.
Yeah. Wherever he tried to teleport, where his body would have come into contact with the solid object, his body bits there just vanish. No trace. No blood. Just gone. Though the aftermath is a bitch to clean up.
Oswald's experienced that situation exactly one time. One. And he intends to never go through it again. Which is why he's very, VERY careful about using his Semblance. If he teleports in front of somebody who is swinging their sword down and isn't already in position to block, that hit's gonna get him.
Or traumatically and violently erase part of his body.
So, yeah. Oswald's Semblance. Useful, but potentially deadly.
Hope this hasn't crossed too many OP lines.