Meet the tower families

In Zero Bound every tower sends out its own squad whenever its cooldown ends. The tower and the squad belong to one family, and the family's signature ability is there from T1 and grows with every tier.

Two towers of the same family and tier merge into the next tier. From T5, feed it more towers of its family to awaken it all the way to T10, with new parts, colours and effects at every stage.

See T1, T5 and T10 of every family in the tower families section of the home page.