And remember, this is all about a single set
Tatyova, Benthic Druid I wont pretend that Tatyova, Benthic Druid is a terribly exciting merfolk commander, but it does offer very consistent value in the form of card advantage
It starts out as a 3/3, so you'll likely wind up with a 6/6, 7/7 or 8/8 if you're doing well seeding your graveyard
Tekuthal, Inquiry Dominus If you want a challenge, then the Mono-Blue Commander Tekuthal, Inquiry Dominus is the mechanic's most explosive payoff
Darksteel Monolith Darksteel Monolith is an extremely strong card in the Eldrazi Unbound precon deck, as it allows the player to cast enormous Eldrazi cards like Kozilek the Great Distortion for free, not to mention powerful instants or sorceries like Rise of the Eldrazi
Also good to note is that this card works beautifully with Maskwood NexusMaskwood Nexus