There's a limit to how much their songs can be interrupted.
[ G guardian ] (Usable when both fighters' vanguards are grade 3 or greater, and the number of face up G guardians in your G zone is three or less) -Opponent Turn's Guard Step-[Choose a card with "Heal" from your hand, and discard it] Call this card to your (GC) from face down.
[AUTO]:When this unit is placed on (GC), choose up to one grade 1 or greater card from your hand, and call it to (RC). If you called a card, this unit gets [Shield]+10000 until end of that battle.