During today's session, the Bad Guy used Scrying to spy on the party (as the Bad Guy has met the party before), and then used a Teleport spell to send some monsters to attack them. I wasn't sure how to describe the monsters appearing; the spell just says the targets "appear where you want to". Is there a flash of light, or a sound, or anything? Or just suddenly and silently they're just there?
The main reason I want to know is to figure out whether there's some indication that the party's Wizard could use to help determine that the reason the monsters appeared was a Teleport spell, as opposed to some other form of magic (or something that was just inherently part of how those monsters behaved).
I could certainly just make up an answer, or allow some sort of Arcana check for identifying what the cause was, I just wanted to know if there was any precedent (perhaps from other editions) that I should be aware of before just making something up.