If a monster(s) in your opponent's possession is destroyed by battle or card effect: You can destroy all cards your opponent controls
However, their sheer numbers with massively awesome tribal Lords from Goblin Matron to Goblin Lackey enable you to build a very potent deck with powerful entries, despite a tendency toward being small and quite smashable
Lets not forget, too, that we have further Knights that have already been mentioned: Bloodsworn Steward, Cavalier of Dawn, Thalias Lancers, Puresteel Paladin, and Knight of the White Orchid will all allow free equips
Kefka, Court Mage (Borderless) 3
Alternatively, you can allow buyers to bid for your cards and sell to the highest bidder
Update 21-09-2022: An official distributor listed a new wave for this product scheduled for December 2022