This team is the magnesand. The idea is to support excadrill with magnezone, which removes the steel birds. To help with that, there is lando-t, which can lure them and pivot on them safely and bring zone. There is also slowking and corviknight which can pivot and check OU's big threats. Lando-t is your speed control option outside of sand and can clean up game. However, the general idea is that once corvi is dead, you get sand up and clean with +2 drill. I've already reached 1700 elo with a variation of this team that had torna pivot over corviknight and toxapex over slowking. If you have any feedback about it, don't hesistate to tell me.