Providing cheap health and mobility, Climbers are the last piece of the common puzzle for Cave Goblins. Don’t be afraid to swarm your opponent with Climbers and send them through the enemy forces, where they will cause chaos. They may seem inoffensive with their 1 attack strength, but their threat can be very high.
They are gate blockers, they can bring along Clingers or let Sneeks himself Sly in, and with the help of Pile On and/or Enrage the Horde, the damage output can quickly get out of control.
For your opponent, having to deal with 3 health to get rid of a 0 cost unit instead of other targets is going to be a painful decision.