I cast Torrential Gearhulk, can I cast Memory from my graveyard with gearhulk's triggered ability?
As I understand and with some basic rules I know, I can't, because Memory is a sorcery and gearhulk says I can cast an instant. But I read that split cards count as 1 card with converted mana cost equal to total of converted mana costs of each of the card's parts. That means this card is an instant and sorcery at the same time as long as it remains in the graveyard at least and I can cast it with gearhulk and choose both parts to be cast, I found it too good to be true for standard and I wanted to know if this is right. (Please explain)