O.g popping hearts (red, purple, black)

[Narrix]

Does anyone remember how you could get them and if it's still available with some special chests or something? OH..and what the name is...

I'm talking about the hearts that u could equip as an vanity (on the banner slot i believe) that would pop out of your toon. Red hearts, blue, purple, black and maybe some more colours idk.

thanks in advance