Berta, Wise Extrapolator (PSOS #175p)
Berta, Wise Extrapolator is a rare printing from Secrets of Strixhaven Promos (PSOS #175p), a Legendary Creature — Frog Druid. Illustrated by Tuan Duong Chu.
Card text
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.
Details
| Mana cost | {2}{G}{U} |
|---|---|
| Type | Legendary Creature — Frog Druid |
| Power / Toughness | 1 / 4 |
| Rarity | Rare |
| Set | Secrets of Strixhaven Promos (PSOS) |
| Collector number | 175p |
| Artist | Tuan Duong Chu |
| Released | 2026-04-24 |
Current price
As of 2026-10-19, Scryfall listed this printing at non-foil $0.54, foil $1.29 (USD). Prices change constantly, so check the live price before buying.
Buy Berta, Wise Extrapolator on TCGplayer
Legality
| Standard | Legal |
|---|---|
| Future Standard | Legal |
| Historic | Legal |
| Timeless | Legal |
| Gladiator | Legal |
| Pioneer | Legal |
| Modern | Legal |
| Legacy | Legal |
| Pauper | Not legal |
| Vintage | Legal |
| Penny Dreadful | Legal |
| Commander | Legal |
| Oathbreaker | Legal |
| Standard Brawl | Legal |
| Brawl | Legal |
| Competitive Brawl | Legal |
| Alchemy | Legal |
| Pauper Commander | Not legal |
| Duel Commander | Legal |
| Old School | Not legal |
| Premodern | Not legal |
| PrEDH | Not legal |
| TLR | Not legal |
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Rulings
- March 20, 2026 — An increment ability will only trigger if the permanent it's on is a creature. Similarly, if the permanent is no longer a creature when its increment ability resolves, the ability won't do anything.
- March 20, 2026 — The increment ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.
- March 20, 2026 — If increment triggers, the comparison will happen again when the ability tries to resolve. If the amount of mana spent to cast that spell isn't greater than either of that creature's stats anymore, the ability will do nothing.
- March 20, 2026 — When comparing the mana spent to the creature's stats as the increment ability resolves, it's possible that the stat that is less than the mana spent changes from power to toughness or vice versa. For example, say you control a 1/3 creature with increment and you pay two mana to cast a spell. Since the amount of mana you spent is greater than the creature's power, increment will trigger. While the increment ability is on the stack, an effect gives the creature with increment +2/-2, making it a 3/1. When the increment ability resolves, the creature will still get a +1/+1 counter since the amount of mana you spent is greater than that creature's toughness.
- March 20, 2026 — Whenever you cast a spell, check the amount of mana you spent to cast it against the power and toughness of the creature with increment. If the amount of mana you spent isn't greater than either of that creature's stats, increment won't trigger at all.
- March 20, 2026 — Berta's second ability isn't a mana ability. It uses the stack and can be responded to.