The War Within Introduction scenario was recently tested on the Beta servers, and observant players have noticed an easter egg that is literally a blink and you miss!
Thanks Lazey for the tip!
One of the more niche yet iconic locations in Dalaran is the fountain, in which many iconic WoW lore figures over the years have made wishes by throwing coins into the fountain — And you can fish for these coins in two different achievements, The Coin Master (WotLK) and The Wish Remover (Legion).
In the final moments of Dalaran before it inevitably crashes into Khaz Algar, for the introduction of The War Within, players do cross into the area where the fountain is located (right before the last portion where you need to kill Queensguard An'Jak Shabtir). Turns out, you can fish in the fountain here as well!
… Yeah, sure. This is fine.
Fishing at the Dalaran fountain during this very specific stage of the War Within introduction scenario gives you one item and only one item, which shows Xal'atath is indeed knowledgeable to Azeroth traditions — Xalatath's Rusty Coin!
As of our testing it, this coin is a guaranteed catch on your first fishing cast, and after looting the coin you don't get any additional bites. If you like collecting souvenirs, make sure to not forget to catch this coin before Dalaran is gone… for now (maybe?).