The Vancouver and London mulligan are fairly recent changes that smooth out opening balance, and in my experience players are quick to adopt rules that mitigate the feeling of being on the backfoot
Neither is what you want when the goal is a card that sits naturally in a mixed hand
The keywords and mechanics are what make this a wonderful card: Flying and haste make it fast and able to avoid many answers, and even though the plot cost isnt cheaper than the mana value, this card can swing for a massive amount of damage after its cast from exile
Flayer of Loyalties Flayer of Loyalties is expensive at 10 mana, but it has the best threaten effect on an ETB
More recently, however, the strength and appeal of this card have somewhat faded into obscurity
A Sapphire player on turn one can easily play an item like Pawpsicle for 1, draw a card, then destroy the item and develop a 3/3 immediately