I've been playing a Cyber Dragon deck for a few days now and today suddenly Cyber Dragon Nova's effect that states:
"Once per turn: You can detach 1 Xyz Material from this card, then target 1 "Cyber Dragon" in your Graveyard; Special Summon that target."
Isn't working. I have a Cyber Dragon already in my graveyard before this card is summoned but the activate button wont appear for this effect.
Can anyone help with this issue please?