It was not until the appearance of the Dinosaur's Structure Deck, where Calamities became a key player in the metagame
Cards designed for Spider-Man dont have to introduce people to Spider-Man everyone's familiar with Spider-Man at some level but they do have to pay off folks conception of the characters and the big canon moments
(Rule 704.5c) Creatures you control with toughness of 0 or less remain on the battlefield
It is a pretty expensive enchantment, price-wise, that costs 1 green and 4 generic mana to cast
Personal opinion: The best practice is always to playtest your deck and decide what feels better for it based in its needs and the way you like to play
I like swapping the Pithing Needle for Sorcerous Spyglass given we want to Chalice for 1 quickly, but I still like having some Needle effects for Ral, Izzet Viceroy, Engineered Explosives, or Jace, Vryn's Prodigy