Board Thread:Plants vs. Zombies Heroes/@comment-28629991-20171123093700/@comment-26278349-20171209175057

Some of those tribes do have a purposes, for example, King Zombie used to not Re-Knight KotLD, but since they removed the Knight tribe, King Zombie does Re-Knight them. Similar reason there's a Pinecone tribe. However, Moss and Clock don't seem to have purposes.