Emperor Oak - Essentially a giant Treelord pretender for nature nations. Immobile, starts with high nature. Can summon Hamadryads in a battle, maybe some Domsummon effect too, or gems.
Void Flame - A cold, lifeless, hostile flame not from this world, bruning in sickly green and otherworldly colours...It burns underwater with ease and those who venture close enough may be struck with insanity. Void creatures will spawn from it when it's threatened.
King in Yellow - A humanoid pretender for R'lyeh, but it's not a human, nor an illithid not ever from this world... A rainbow-mage esque pretender with insanity powers-