How should I care for it?
SOLVED: Is this a succulent??
Looks like an euphorbia to me. Not sure which one.
Do you know if it has milky looking sap? Which btw can be very irritating.
Like this one. https://www.vipbro.pw/media/BrDwGj6g4xY
Devil's backbone usually has zigzag stems though. Maybe that develops as the plant ages. I do not know. https://davesgarden.com/guides/pf/showimage/272479/#b
Pedilanthus. A variegated version. Look it up on the web for care instructions.
Looks like we agree mikerotell. Pedilanthus is a synonym of euphorbia.
Pedilanthus tithymaloides 'Variegatus' is a synonym of Euphorbia tithymaloides 'Variegatus' which are what the picture links are of above.