Nope, this has definitely never happened to me and it totally wasn't back-breaking at all if it did
Magister Sphinx Dropping someone straight to 10 life is a huge power move, and Magister Sphinx does exactly that the moment it enters the battlefield
It can be used not only in a defensive way, clearing annoying ETBs or powerful abilities, but also in an offensive way, making Deaths Shadow 13/13 or Kroxa, Titan of Deaths Hunger a two mana 6/6
That kind of tutoring ability smooths out draws and keeps your strategy flowing, no matter how awkward your opening hand looks
5 Blighted Agent Another staple in Modern and Legacy Infect, Blighted Agent is a tiny creature compared to some of the others included on this list
Both Bloomburrow and Thunder Junction had a ton of cards clearly designed with the format in mind