Soul Swift (ソウル神速, Sōru shinsoku) is an ability introduced in SD31. It is an evolved form of High Speed and Violent Swift. So far, only two green spirits have this ability, The WhirlwindNinja Kirikage and The StarKnight HerculesΩ (revived version).
The effect reads:
- Flash- Soul Swift (Either Attack Step)
You can summon this Spirit card from your Hand by using (Soul Core) from the Reserve to pay the entire summon cost and cores from the Reserve to put onto it.