@HellcowKeith
How do spells like sending work with changelings if you have met various changelings under the guise of the same face/persona?— Son Of Sora Kell (@SoraKell) March 22, 2020
The basic issue here is what it means to be “familiar” with someone. Imagine you know a human who’s used a disguise kit to impersonate Bob. You’ve never met the real Bob. You use Sending to send a message to Bob. Do you connect to Fake Bob? Or Real Bob, who you’ve never met? I’d argue that Sending doesn’t care about what your target looks like; what matters is your PERSONAL CONNECTION to them. Thus in my example you’d connect to Fake Bob… and you could send a message to any friend, changeling or otherwise, polymorphed or disguised. However…
— Keith Baker (@HellcowKeith) March 22, 2020
… Sending also doesn’t reveal anything about your target or have obvious physical signs. If you Send to Fake Bob while they’re standing next to you as Joe, the message goes through; you don’t have any sense that Fake Bob is in the room or currently disguised. At least, that’s how I would handle it.
— Keith Baker (@HellcowKeith) March 22, 2020