Pensive Professor (Extended Art) [Secrets of Strixhaven]

Cost: 1 U U Increment (Whenever you cast a spell, if the amount of mana you spent is greater than this creature's power or toughness, put a 1/ 1 counter on this creature.)
Whenever one or more 1/ 1 counters are put on this creature, draw a card. To the patient mind, no problem is unsolvable.