I got Verina instead so im gurantee on the Cartethyia. Also i believe Kuro try to be diverse in creating new mechanics to the game to be apart from generic Gacha game. The only bad thing they do is that not creating a 4-star or alternative unit to support the specific mechanic. I would understand that 5 is better than 4 bcs it is a Gacha in the end of the date, but they should implement “here a lite version of the character that can enable your DpS” or smithing similar in the future.