The Wise man's grand child is a homunculus (WMG harem x Iliya futa reader)

On a fateful rainy day, Melida Bowen or as populary known as the guru was heading to Merlin's house while getting caught in the rain. While walking she heard commotion so she went to check it out and when she got there she saw a hulking mountain of a man with a stone like sword, beside him were demon two tiger corpses and in his arms are two young girls and a baby, when the man and her lock eyes he'd only put them down and nodded at her then he disappeared and all was left was a card, once she picked of the three children she saw six other similar cards in the clutches of the baby, once she made it to Merlin's house she saw him with a baby boy, how will the worlds very best in magic handle with raising two young kids with no Common sense.