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 Berta, add one mana of any color.
{X}, {T}: Create a 0/0 green and blue Fractal creature token and put X +1/+1 counters on it.
Berta, Wise Extrapolator has 3 listed printings; the most valuable is the Promo Pack printing from PSOS at US$0.54 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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