It is an interesting card, but it is difficult to play. A very quick way to summon it is with Ninjitsu Art of Transformation with a Ninja / Warrior engine, but in that case it is not possible to activate its effect. Playing a pure Beast deck is very difficult: they often go in combination with Beast-Warriors, and Behemoth only works with the Beast-type
Yeah i understand it's kinda hard to summon it and to keep it in play, since anything can remove it, but i taught that can be useful for something, and btw can you play some beasts with rescue cat and milius radiant, i saw once some otk combo for it, but it had some other earth element monsters like injection fairy Lily?