You will need to make 7 copies of this card to complete the collection.
Legendary Sword =
Gavin the Squire + Spell Book 
+ Short Sword
Spell Book = Magic Potion + Scroll + Fairy Queen
Armored Knight =
Gavin the Squire + Legendary Sword + Knight's Shield 
Alfgar the Wise =
Armored Knight + Crystal Ball + Dark Slime
Dragon =
Armored Knight + Legendary Sword + Fairy Queen
Wizard =
Dragon + Scroll + Spell Book
Castle =
Wizard + Alfgar the Wise + Dragon
Castle =
Wizard + Alfgar the Wise + Dragon