In the right build, this card could easily do more work than a Blood Artist, especially because it hits all opponents
Even with all of that, youre not playing the most threat-dense deck (Spirits plays, on average, about 8 more Creatures than Rogues does) and you dont have the instant-win button that is Shacklegeist, so the matchup becomes a bit more work than youd otherwise have to do as Spirits
Obviously, you have to play black considering the enchantment requires three black lands, but if you are playing another color in combination with black, you can give a green, blue, white, or red creature fear
Protection spells, like Crypsis and Take Up the Shield, are also great with Zethi since you have to attack with them to trigger their ability