Create Monstrosity

In addition to the material cost for this spell, you must also have a living but incapacitated beast that closely resembles the desired monstrosity (at the DM's discretion). The beast must remain incapacitated and within 5 feet of you for the duration of the casting time. 

When the spell is complete, the creature is transmuted into a monstrosity with a challenge rating 2 or lower and with a maximum Intelligence score of 7. If you desire a monstrosity not in the Monster Manual or other sourcebook, you may (with the DM's permission) edit or create a statblock for the creature with the same previously mentioned restrictions. The creature appears in an open space within 5 feet of you. 

You are not in control of the monstrosity, and it will act according to it's nature and alignment described in the Monster Manual or other sourcebook. If it is domesticable, like a griffon or hippogriff, you may however attempt to train it if desired. When the creature is reduced to 0 hit points, it dies or becomes unconscious (dependent on the intention of the attacker).

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the maximum challenge rating increases by 1 for each slot level above 6th.