You have Elves with uncommon Green abilities, like creatures that draw cards (Elvish Visionary, Multani's Acolyte), Regeneration (Ezuri, Renegade Leader), Lure (Elvish Bard), restock your library (Elvish Soultiller), creature search (Fierce Empath), and such
-7: You gain X life and draw X cards, where X is the number of lands you control
Unlike Commandeer, you can snatch a creature as well, which might just be life-saving (although folks dont hard cast Craterhoof Behemoth too often, I suppose)
Zethi, Arcane Blademaster If you look on the EDHREC page for Zethi, a lot of the instants listed are already pretty efficient, but I think it makes more sense to add more expensive and impactful instants instead of copying Opt or Curate
It enters with two +1/+1 counters for each time youve cast your commander from the command zone that game, and also lets you draw a card whenever a creature you control with a counter on it dies