Undertale: Biased Boss Rush

A classic soul ops game Controls: Press V for Dash, You're able to change button in settings Some attack are able to contact with other players or yourself (example: AfterTale bonezone) Every boss has a chance to drop soul fragment Wave 1 - 10% Wave 2 - 20% Wave 3 - 30% Wave 4 - 100% for Determination Fragment you need to complete Wave 4 You're able to get determination fragment only 1 time