Fractal Tender [Secrets of Strixhaven]

Ward 2

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.)

At the beginning of each end step, if you put a counter on this creature this turn, create a 0/0 green and blue Fractal creature token and put three +1/+1 counters on it.