Wouldn't it be cool if we had a champion like majordomo from hearthstone?

I guess we have some taht are kind of similiar but like Majordomo is a card that when he dies, he replaces your hero with ragnaros who can deal 8 damage to a random enemy for 2 mana. So something like for his ult, upon activation, if majordomo dies within the next 6 seconds he awakens the firelord. While the is awakened, you gain access to new abilities (involving fire and stuff) and can reactivate R to set an area on fire. While enemies are in the fire, they take X damage per second.