The Ambassador Seeds drop every 400 days if the trees remain healthy. The seeds drop simultaneously in paired worlds, and swap an "ambassador" from a species to the other cell when they are touched by at least one of each species. These seeds allowed for all the species to meet each other for the first time (intense, but a short meeting), and later discover more about the other species. The location is defined by where the seeds are before the swap. They have a recharge, at first very quick, allowing for a quick return, but grew slower over time, requiring longer visits between species.