Nashi also uses life as a resource, so any deck that uses this rat as a main rather than a side piece needs some lifegain to balance that
If you control no other creature with power 4 or greater as the ability resolves, nothing happens
Some options include: Knight of the White Orchid, Kor Cartographer, Solemn Simulacrum, Myriad Landscape, Azorius Signet, Boros Signet, Commander's Sphere, Fellwar Stone, Izzet Signet, Sol Ring, Sphere of the Suns, Wayfarer's Bauble, Coalition Relic, Chromatic Lantern Protect the 'Druu Zedruu has a tendency to, well, die a lot, at least in my experience
You can deal even more damage than usual by pairing this with a card like Vito, Thorn of the Dusk Rose
This is my first Golgari colored non-partner leader