Sabatiel - The Philosopher's Stone (DRLG-EN015)

If you have a "Winged Kuriboh" monster in your Graveyard: Pay half your Life Points; add 1 "Polymerization" Spell Card or "Fusion" Spell Card from your Deck to your hand, except "Diffusion Wave-Motion". If this card is in your Graveyard: You can banish 3 copies of "Sabatiel - The Philosopher's Stone" from your Graveyard, then target 1 monster on the field; it gains ATK equal to the ATK of the monster on the field with the highest ATK (your choice, if tied), until the end of this turn.