Euphorbia horrida f. monstruosa
These have a very irregular shape and will eventually form a mound. Care is just like most other Euphorbias. They like a little more water than other succulents, so let them dry out but not for too long. They like lots of light but protect them from hot summer sun.
Your plant will be similar to the one in the photos.
Part sun, protect from hot afternoon sun
Let dry between watering, water deeply
Vivid Root Bark Mix or similar
shown in 3.5" pot
Ships bare root. Pot and soil not included.