Sort of like Spike Storm! but 7 Bloontonium cost and only one charge, and can carry over damage on remaining spaces in the opponent's bloon queue. The key difference is that the damage carries over rounds, instead of instantly, and does 30 damage up to two times per space.
Decks that frequently send Bloons may find this card useful, as they'd usually always have plentiful Bloontonium sources anyway.