While most decks won't have tons of MTG Vehicles, getting to draw from both MTG equipment and auras is sweet indeed, making Sram a very good inclusion in most Voltron decks
The deck only has seven cards in it that can actually win a game (three Snapcaster Mages, two Monastery Mentors, two Jaces)
This card is likely a reference to Goblin Rock Sled, a weird card from The Dark that also features a goblin having fun but in a much less snowy way
Vaultborn Tyrant is a green dinosaur that draws cards, gains life, and is hard to kill
The unfortunate truth is that some opposing decks have little to no good instants or sorceries worth getting, but great creatures are much more likely
But what makes Mystic Snake one of the best counters ever printed is the sheer synergy with cards like Momentary Blink or Crystal Shard