Re-add Baron von Bats and Zen Sensei to the backyard battleground

Baron von bats and zen sensei were part of the backyard battleground chaos in the beta version and it was really sad to not see them return. At the moment, the plant bosses have the advantage because one can teleport (super bean) and one can summon healers (sunflower queen) It would be really great to see them return.

I know there is separate quests, but it would be excellent to see them spawning randomly like the other bosses that appear in the backyard.

Also, I noticed that the plants have heal weeds. The zombie should have healers, like the heal zombie to make it fair.

Please re-add the two bosses to the backyard!

🙂