2 question about new items from patch

Durability equipments are not available yet, so no, they do not include Reverse.

About the Mystery Boxes, they were added in patch v083:

Mystery Box
A box whose contents are unknown, though a Yellow Butterfly might just be hidden inside. It will be empty if opened by a character higher than Lv. 41.
NPC: Cassandra
Tradeblock


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Mystery Box
A box whose contents are unknown, though a Yellow Butterfly might just be hidden inside. It will be empty if opened by a character higher than Lv. 71.
NPC: Cassandra
Tradeblock


---------------


Mystery Box
A box whose contents are unknown, though a Yellow Butterfly might just be hidden inside. It will be empty if opened by a character higher than Lv. 101.
NPC: Cassandra
Tradeblock


---------------


Mystery Box
A box whose contents are unknown, though a Yellow Butterfly might just be hidden inside.
NPC: Cassandra
Tradeblock