"A lot better than one by one," he comments, eyeballing(?) the numerous ayakashi around them while they're still invisible. While that'd be safer, it'd take way too long, regardless of whether or not he can keep the ice from melting. It's also of a temperature that it'd stay solid on its own just fine, but...

Shouto just silently hopes that this works, if only so that they don't wind up being mobbed.