Archfey Misty Escape

[Bosh]

Looking at the level 6 Archfey page it says "Upon taking damage, become Invisible. On your next turn, you can cast Misty Step, though this will break your invisibility." The question is, what kind of action is the resulting Misty step? Is it a bonus action? Does it use a Warlock spell slot?

[Farsha]

If it’s misty step from archfey.
It will use bonus action like normal misty step, but no spell slot.
It’s icon should appear on the right of the UI where stuff like reapply conctrations spells, metamagic and other special skills appear.