Excadrill

Excadrill serves two main roles in the Uber tier. Firstly, with a high base 135 Attack and an ability that doubles its decent base 88 Speed in sandstorm, Excadrill is a terrifying sweeper. Swords Dance is the icing on the cake, pumping Excadrill's already high Attack stat to insane levels. Excadrill has the perfect typing for a sweeper too, being immune to both Thunder Wave and Toxic, while resisting Stealth Rock. Its concise movepool contains all it needs to sweep, allowing it to act as a decent offensive Rapid Spin user. Secondly, Excadrill possesses the bulk and typing to run a bulky spinner set in the rain. Its ability, Mold Breaker, allows it to smash the commonly used spinblocker, Giratina-O, with a powerful STAB Earthquake.