Wicked Shillelagh

The Dewclaw Batsuit Boots is the Feet armour segment of the Dark Specter Batsuit Iconic Battle Suit.

Source
The Dewclaw Batsuit Boots is can be bought from Batgirl in the JLA Watchtower's Tech Wing

Trivia

 * Prior to Update 18, the armour piece cost 45 Marks of Distinction; earned by completing Tier 2 Duos, by defeating bosses in Tier 2 Alerts, completing the Daily Tier 1 Alert, and completing South Gotham oriented quests only available in The Battle for Earth DLC.