You will need to make 16 copies of this card to complete the collection.
Spell Book =
Magic Potion 
+ Scroll + Fairy Queen
Legendary Sword =
Gavin the Squire + Spell Book 
+ Short Sword
Skeleton Warrior =
Restless Spirit + Spell Book + Buckler
Wizard =
Dragon + Scroll + Spell Book
Armored Knight =
Gavin the Squire + Legendary Sword + Knight's Shield
Dragon =
Armored Knight + Legendary Sword + Fairy Queen
Castle =
Wizard + Alfgar the Wise + Dragon
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
Wizard =
Dragon + Scroll + Spell Book
Castle =
Wizard + Alfgar the Wise + Dragon
Castle =
Wizard + Alfgar the Wise + Dragon