You give Gustuv Lansdown Blank Augmentation Gem. Gustuv Lansdown tells you, "hen you use this gem, you will no longer require a focus to cast Creature Enchantment spells. Read the gem's description before you use it though." Gustuv Lansdown gives you Infused Creature Magic. The FOCI that this Gem replaces is the blue "Foci of Enchantment"