Once per turn, you can remove from play 1 face-up Beast-Type or Beast-Warrior-Type monster you control to select 1 other face-up Beast-Type or Beast-Warrior-Type monster you control. The selected monster gains the original ATK of the monster removed from play for this effect.
This card can increase the attack of your monsters.
You have to banish a monster in the field in order to increase your other monster's attack.
It can only banish and increase the attack of face-up Beast-Type or Beast-Warrior-Type monsters.
This card will only work on Beast-Type or Beast-Warrior-Type decks. Beast Rising can make your monster have a very high attack, since the attack increase is permanent (Even if this card is destroyed or removed from field) and it can be used once per turn (Even at your opponent's turn.) You can also use its banishing effect to dodge your opponent's monsters attack.
Banishes from your field / Banishes from field for cost
So, its a permanent Gift of the Martyr for beasts(-warriors). It sounds super OP, but it really is only usable if you are already winning (field control with at least 2 monsters alive). Good for a risky finishing blow.
Lol have you played beast decks? You don't realise how easy it is to get more than 2 on the board with beasts.
What were Konami thinking releasing this card?
By adding the atk power of just 2 4 star monsters you can have roughly 3600 atk permenantly which make sit more powerful than almost any monster in the game.
If you do manage to destroy it by mizichure or something the trap is continuous to allow it to be used again.
It should either be for 1 turn only or have a cost to keep running every turn.