Loxodon Warhammer isnt quite Shadowspear but, to evoke the same refrain, nothing quite is
There are plenty of ways to exploit this effect
The Eldrazi Spawn are expendable, so don't hesitate to sacrifice themto Bloodthrone Vampire for a temporary boost, or to Magmaw for damage
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
Players will undoubtedly test this out in Blink decks soon, and it may well earn a permanent spot there, but for now its an honorable mention at best
Some older cards have received errata to instruct a player to mill cards rather than to put the top cards of their library into their graveyard