At the end of each friendly turn, nominate a Jungle Swarm unit within 6" of each Bastiladon with an Ark of Sotek and roll a D6. On a 4+, add one base to the Jungle Swarm unit. This can take the Jungle Swarm unit beyond its starting size. If the base cannot be placed (because there isn't enough room, or you don't have sufficient models), it is lost.