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Commander Nexus
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  3. Berta, Wise Extrapolator

Command zone

Berta, Wise Extrapolator

Berta, Wise Extrapolator

Legendary Creature — Frog Druid

Berta wants a deck that keeps making its creatures bigger turn after turn. It also suits a deck that makes an army of small creatures and attacks with all of them.

  • Mana cost2 genericgreenblue
  • Blue, Green ()
  • Power / toughness1 / 4
  • RarityRare

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, tap: Create a 0/0 green and blue Fractal creature token and put X +1/+1 counters on it.

Build a deck with Berta Find it in the app

Themes

Cards That Fit Berta, Wise Extrapolator

Picked for what they do in Berta's deck. When two cards do the same job, the one with the lower comes first. All of them fit Berta's color identity.Mana ValueThe total amount of mana a card costs, all added up. A card costing two generic and one green has a mana value of three. Wizards renamed this from "converted mana cost" in 2021, so older cards and articles may still use the old name.Sol RingOpen the full glossary

plan6

The 6 Cards

plan6

The 6 Cards

Rulings for Berta, Wise Extrapolator

explain how Berta works in tricky situations. They come from Wizards of the Coast, the company that makes Magic.RulingThe official answer to how a card works in a tricky situation. Most rulings are written by Wizards of the Coast, the company that makes Magic, and a few are notes from Scryfall, the card database Magic players use. A ruling explains a card. It does not change what the card says.Open the full glossary

Wizards of the Coast 20 Mar 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.

Wizards of the Coast 20 Mar 2026

Berta's second ability isn't a mana ability. It uses the stack and can be responded to.

Wizards of the Coast 20 Mar 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.

Wizards of the Coast 20 Mar 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.

Wizards of the Coast 20 Mar 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.

Wizards of the Coast 20 Mar 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.

6 rulings, all written by Wizards of the Coast. Read the originals on Gatherer ↗

Similar Commanders

Commanders that share the most with Berta, and what they share.

Color identityEvery color of mana symbol on a card, in its cost and in its rules text. Your commander's color identity sets the limit for your whole deck: every other card has to fit inside it. A deck led by a green and white commander cannot play a card with any blue in its color identity.Open the full glossaryUGPlayers write colors as letters: U for blue, G for green. Blue is U because B was already taken by black.+1/+1 Counters+1/+1 counter decks put small markers on their creatures that make each one permanently bigger, and keep adding more every turn. Each +1/+1 counter adds one to a creature's power (the damage it deals) and toughness (the damage it can take).Open the +1/+1 Counters pageCounter EngineAdds +1/+1 counters over and over rather than once. A counter here is a small permanent marker that raises a creature's power and toughness for good. It is not a counterspell, which is a different thing entirely. Something that adds them every turn makes your whole board bigger and keeps it that way. Hardened Scales, Corpsejack MenaceOpen the Counter Engine page+1/+1 CountersPuts +1/+1 counters on creatures, permanently raising their power and toughness. Unlike a temporary boost that wears off at end of turn, these markers stay put and stack up over a long game. Hardened Scales, The Great HengeOpen the +1/+1 Counters pageTokensToken decks fill the battlefield with small creatures made by their cards, then attack with all of them or make them all bigger at once. A token is a creature (or other object) that a card creates, not a card from your deck.Open the Tokens pageToken EngineMakes tokens again and again rather than once. A token is a creature or other permanent created by a card, with no card of its own. Something that makes one token gives you a body; something that makes them every turn gives you a board you can keep rebuilding after it is cleared. Grave Titan, Bitterblossom, OphiomancerOpen the Token Engine pageToken MakerCreates one or more tokens. Different cards make very different ones: creatures Grave Titan, Treasures Smothering Tithe, Clues Tireless Tracker or Food Gilded Goose. This is one of our largest tags, so pair it with an archetype or theme when you are hunting a specific kind.Open the Token Maker pageRampAn effect that accelerates your mana, giving you a reusable mana source beyond the usual one land per turn. Cultivate Rampant GrowthOpen the Ramp page