cache exists in db
Equivalent cards to Ludevic's Test Subject (blue, transforming creature):
1. Thing in the Ice – Also a blue creature that transforms after building up counters.
2. Docent of Perfection – Blue creature that transforms into a stronger version.
3. Delver of Secrets – Blue creature with a transformation mechanic.
Reason: All are blue creatures with transform abilities involving spells or counters.