To join or create a Team, you would have to have the "Team Zeppelin" built already.
This building is unlocked at level 16.
Once this is completed, players can join or make a Team.

By making your own team, you get to decide what requirements members will need to join.
1) Monster Power
2) Open / Private Group.

- Monster Power is the sum of all of your Monster/s combined with their stats and runes etc.
- Open – Players can join the Team without confirmation as long as they have the right Monster Power requirements.
- Private – Players request to join the Team and the Leader / Co Lead can accept or reject.

Otherwise, ask your friends for the Team name or join one that you think you can provide help for.

Good Luck!