Trying to understand this quote has my head hurting..

{{champion:91}} "Their bones will wet my blade" Aren't bones supposed to be dry like "dry as a bone"? Is this supposed to be funny/ironic? Something like "Their blood will wet my blade" would be cooler and make more sense. SOMEONE EXPLAIN EDIT: This has been explained to me, so I'm no longer in need of answers ^-^
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