Some of the best cards that work with Vial Smasher include those that add extra damage for your spells, like: Angrath's Marauders Guttersnipe Solphim, Mayhem Dominus 5 General Kreat, The Boltbringer A Powerhouse In The Command Zone A lot of Goblin decks revolve around getting out a ton of tokens or by dealing tiny amounts of damage either all at once or over the course of the game
Good Commander decks rely on tons of card advantage and this tiny little creature punishes that
We have seen this in Ice Age (1995), Alliances (1996), Coldsnap (2006), and Modern Horizons
On that note, this is also possibly the best Yorion, Sky Nomad Cube ever built given that it will be relatively easy to play every card that you draft, though I wouldnt pick that one as highly
Landfall - Whenever a land you control enters, mill a card