Control is reasonable as well, especially if we can stick a Mastery of the Unseen (see our matchup against Izzet Breach, when sneaking in a Mastery of the Unseen through counters pretty much won us the game all by itself)
Virtus the Veiled It may be designed to partner with Gorm the Great, but Virtus the Veiled is a little ridiculous even on its own
Either way, this will be a good way to slow down the opponents board while also adding to your own, even if the creature cant immediately get in there for damage
Hakbal, the Surging Soul himself, does a lot in this regard, allowing each merfolk to explore at the start of your combat
With the unique ability to grant ZombieLink, this cards limited supply will soon be depleted by ambitious Commander players