Before: Attacks the opponent’s units in the front row and has a given chance of causing [3 COMBO] and [High Float].

Now: Attacks the opponent’s units in the front row and has a given chance of causing [High Float]. Gaara will also generate a [Shield] for himself based on 30% of his Resistance.

Straight from the change from 3.0 to 4.0 on gaara sand shower however due to the wording was probably meant to only gain a shield when he combos since it says also.

Well its word for word on the update for characters if you look under the news section.