Astrapste Argo: The Dazzling Ship that Splits the Heavens (天上引き裂きし煌々の船?) is Jason's Noble Phantasm. Reinforcement from the Argo. The heroes that sailed on the ship begin a simultaneous attack. The more righteous is Jason's position in battle, the larger the support from the crew becomes, and the frequency of the attacks will increase too.
On the contrary, if his position is clearly that of a villain, it will turn into a situation of surprisingly, nobody sailed (sabotage), and its power will remarkedly drop.