The sentence would make sense with can , but would is fine here. It's a conditional. Think of it as Obsidian knives will cut between cells, rather than tear the cells as steel knives would do if you used them instead .
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mirmohamadObsidian knives will cut between cells rather than tear the cells as steel knives would do.can do, could do, will do, would do, may do, might do, or just do are all possible.
mirmohamadalmost from last year my post have been put into post moderate Section!I think I have fixed that now, mirmohamad. Let me know via PM if you have further trouble.