FaceTime Group Calls & Effects
In iOS 12 you can make FaceTime group video calls and this is integrated right into Messages so it's easy to start a group video or audio chat with the people you are already talking to.
FaceTime group video calls support up to 32 callers into one call. This shows you a few people on the big screen who are talking or who you want to focus in on, and the rest of the callers are shown in a roster at the bottom. It looks like a good way to handle a lot of callers, if it works as good in the real world.
You can include your Memoji or Anomoji as well as filters in the FaceTime video calls and the group calls.