You can Special Summon this card (from your hand or Deck) by sending 1 face-up "Lyna the Light Charmer" you control and 1 face-up LIGHT monster you control to the Graveyard. When Summoned this way: You can add 1 Spellcaster-Type monster with 1500 DEF from your Deck to your hand, except "Familiar-Possessed - Lyna". If this card Special Summoned by its own effect attacks a Defense Position monster, inflict piercing battle damage to your opponent.
The ideal combo with this card would be to take an opponent’s LIGHT monster with Lyna the Light Charmer, then tribute both monsters to Special Summon Familiar-Possessed - Lyna from your deck. This combo is slow but it provides an uncommon method of removal.
If only you didn't have to include her weaker self, this might actually be useful. Being able to search out a caster and add it to your hand sounds good.