As much as doubling a creatures power can be efficient, it rarely works that well in isolation
But calling your players (of any game) "greedy" isn't a good look, especially when distributors aren't charging retail for their wares to store owners who are marking those items' prices up
If you werent the starting player, you gain 3 life
And while the card that costs less clause means you cant use cheaper cascade cards to free-cast the big ones, different free-casting effects like Aetherworks Marvel or Creative Technique offer a mana-efficient way to skip to the top of your mana curve so you can let cards like Devastator cascade you all the way down
Henrika, Infernal Seer has what I call the nighthawk trio of abilities that border on keyword soup: Flying, deathtouch and lifelink, and if not for Alela, Artful Provocateur, I'd have called this a vampire exclusive