When Zinnian unseals Ice like Rain with the command "Fulfill!" it transforms into a tiny hanbo with an elegantly carved shaft, and produces a map of the surrounding area within a 100-meter radius, but can only be used once a day.
alchemy_hisoka uses the command "Assimilate" to transform Azure Cherry Blossoms into an unusual stiletto. It has two techniques: first, it causes the battle to be graced by falling flower petals, and second, it causes entangling, thorny vines to sprout from wounds which wrap around the opponent, immobilizing them.
Not only do I have a Borg-style command, but I have a Kurama-style attack and use a weapon mentioned often in Anne Rice's Cry to Heaven!
Armand uses the command "Burn" to transform Peach Blossoms from the Mountains into a blade limned with frost. It has two techniques: first, it cages the opponent in vines, and second, it produces a blinding hail of cherry blossoms.