these green dragons have 2 fears in this world. falchions and fog breath.
The Naga tomes.
Although being red as well, giving Fog Breath only to the Tikis was an odd choice. I still haven't even added it on, since my Adult Tiki is a dedicated anti-bow unit with +Def and -Res and bowbreaker just to have something to say "screw you, Brave!Lyn" in Arena Assault.