Berta, Wise Extrapolator is a rare Legendary Creature — Frog Druid card from Magic: The Gathering (Secrets of Strixhaven, SOS). Current market price: $0.31.
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.
