Talk:Super Dragonblade, Dragoeternal/@comment-24469622-20140925043737/@comment-25061243-20140925055614

Nope you cannot.

Q. When there is only this card in my hand, can I equip this card?

A. No, you cannot. If the [Equip Cost] [Discard all cards from your hand] cannot be paid, this card cannot be equiped. You can only equip this card if you discard all cards from your hand, of 1 card and above.

Source:  http://fc-buddyfight.com/en/rules/question/