Even the great Martial Arts Emperor may have a hard time against the dragons of Medium.
You may only call "Medium Dragon Generation Emperor, Tri Sieger "Dieu"" from the soul of a card on your field once per turn. [Call Cost] [Put any number of monsters from your hand or field into this card's soul.] [Counter]【Act】If this card is on the field or in the soul of a monster, you can pay 1 Gauge, stand a «Dragon Lord» on your field. This ability only activates once per turn. "Spirit Martial Arts"If this card is on the field or in the soul of a «Medium Dragon» or «Dragon Lord», cards with the same attribute as a size 3 monster on your field cannot be destroyed, nor returned your hand, and their abilities cannot be nullified, by your opponent's card effects. If this card would be destroyed, you may call a «Medium Dragon» from this card's soul on top of this card by paying their [Spirit Link] cost. [Triple Attack][Soulguard][Penetrate][Spirit Link][Pay 2 Gauge]