You can keep attaching the sword to bigger creatures to get bigger results
Still, it's free value when it works, either copying your spells or dealing incidental damage, provided you've got the artifacts to spare
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Lava axe
Graveyard recursion is a type of card advantage, so Ive increased that as well, with Danitha, New Benalias LightDanitha, New Benalias Light and Koll, the ForgemasterKoll, the Forgemaster
I will say that Compy Swarm suffers a lot for being green, given that Sacrifice themes dont always go into green, so your Golgari deck will more often rely on killing your opponents creatures to double your Compy Swarms