I wouldn't hold onto it tbh if we get it. As far as i know they haven't added new units to the black ticket since it was released, and Lapis came out a while after the black ticket did. Have heard the black pool from the ticket is quite permanent.

Lapis is without a doubt a really overpowered black and just murders everything in her path with constantly ticking true damage. Another unit that is rather nice is Kibahime, who came out at the same tim as her (i got both in 4 rolls) but she was a bit overshadowed by Lapis in the start because Lapis is loved by everyone.

Other very good blacks we have not gotten yet are Wendy and Rinne, they're both amazing and Rinne is super popular everywhere. No, i can't be arsed to look them up for you, i need to head to work :P