Idea about Keys

Aside from challenges, I really see no use of equipping keys (nor do I see many other survivors equipping them) but, what about making them at least a bit more useful aside from channeling and let them serve their purpose, and instantly open chests?

Rare: could open a chest and then break, so it's even lore accurate

Very Rare: could open 3 chests and then break

Ultra Rare: could open 5 chests before breaking

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