If a Level 3 or lower Normal Monster you control battles, during the Damage Step you can pay Life Points in multiples of 100. The ATK of the opponent's monster is reduced by the amount of Life Points you paid, until the End Phase. (You cannot pay more Life Points than the ATK of the opponent's monster.)
...wut? You can pay as many LP as the monster has ATK. So in Vorse Raider's case, you can pay 1900 LP (but no more, unless it's boosted or something).
it is annoying that when you're auto-dueling the ai doesn't understand not to attack 3 star monsters, when the card is clearly there for everyone to see :/ it's like "cool, my hunter dragon just died to a zombie dragon, again! and now i've lost" i kinda hate the auto-duel ai sometimes :/