Cyber Dragon Sieger (LDS2-EN034) [Legendary Duelists: Season 2]

2 Machine monsters, including "Cyber Dragon"
<br>This card's name becomes "Cyber Dragon" while on the field or in the GY. During each Battle Phase, if this card has not declared an attack (Quick Effect): You can target 1 Machine monster you control with 2100 or more ATK; for the rest of this turn, that monster gains 2100 ATK/DEF, also neither player takes any battle damage from attacks involving this monster. You can only use this effect of "Cyber Dragon Sieger" once per turn.