Ninth Edition Eager Cadet, Baleful Stare, Fishliver Oil, Withering Gaze, Index, Reflexes Sea Eagle, this sextet does a great job of setting up the archetypes of bad Modern cards
Hardened Academic Hardened Academic is substantially better than random creatures that grow when cards leave the graveyard because its counters can go anywhere, so you gain great flexibility on top of a cheap threat
While the sneak cost is the same as the hard casting cost, the structure changes from one green plus three to two green plus two
Despite its very long history and arguably being a core strategy of the game, you just don't see ramp spells in Standard very much anymore
That said, many MTG players advocate for a higher number of cards, with some cubes exceeding 450, 500, or 720 cards