Time Kitsune, JikanKitsu

Time Tailed Magic:

You learn the cantrip Sapping sting. You learn the spell Gift of Alacrity and may use it a number of times equal to your tails

Shapeshifter: 

You may cast Sapping sting and Gift of alacrity in fox form

Stolen Time:

When initiative is rolled you may steal initiative from a target within sight using your reaction and expanding a use of tailed magic. When you do, you steal a number of initiative equal to your tails.