1d8 Polymorphed Wizards

1 Did it to themselves (1d12)

1 On purpose
2 As a joke
3 To prove a point
4 To win a bet
5 To escape
6 For research
7 In order to cast previously inaccessible spells
8 To pursue apotheosis
9 While drunk
10 Just because
11 On accident
12 Will never admit it

2 It was done to them (d12)

1 By a rival
2 By a mortal foe
3 By the gods
4 By their apprentice
5 As punishment for their sins (deserved)
6 In retaliation for their crimes (actually innocent)
7 To teach some lesson (details forgotten)
8 To delay their plans
9 To save them
10 For insurance fraud
11 As a joke
12 Innocent bystander to a miscast working

3 Just happened spontaneously
4 Chronic condition
5 Allergic reaction
6 Fell in a magic pool
7 Woke up that way
8 Doesn't matter, they don't want to go back