If I use this card's {Hand} [Main] effect to digivolve BT21-031 [Sangomon] into this card, ignoring digivolution requirements, does the combination with BT21-031 [Sangomon]'s effect make the digivolution cost 2?

Can I activate this card's {Hand} [Main] effect at the same time as an effect such as P-104 [Mental Training]'s effect that digivolves?