Bribe them
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
They keep card prices low on the secondary market, which in turn lowers the barrier for entry to more and more complex formats
You need these two cards in play: Now you play one of these two cards: You can play whatever lands from Streets of New Capenna , but I chose the ones that make both White and Green mana because those are probably the ones you would want in your deck
Neither Kraza, the Swarm as One nor The Terminus of Return has a secondary title bar
This might be the best convoke commander since you can cast spells for little to no mana, then flicker Aang and Katara to build an even bigger board to convoke bigger spells