Yes, you can chatting with other people in the Shadow Blood, you can find the chat column in the top right corner, like this icon . Tap the speech bubble/box to chat with other player.
There are various chat features
- Channel: You can chat with multiple players in a channel.
- Whisper: You can chat one-on-one.
- Party: You can chat with your party members in Nether Rift or Raid.
- System: You can check maintenance message and obtain item messages from other players.
Change the wisper and system message setting in Preferences.