Jabobius Guinterland

When Jacobius Guinterfield enters the battlefield, roll a 6/sided dice.
If it lands on 1, create seven +1/+0 engineering students. If it lands on any other number, scry 1, draw 1, and solve for the area of a circle, where r is the number you rolled. If you cannot solve in under 10 seconds, all nonland permanents are destroyed.