Card

Berta, Wise Extrapolator

Mana cost {2}{G}{U}

Legendary Creature — Frog Druid 1/4

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.

Part of 227 known combos, one of them two-card. 6 official rulings.

Commander
Legal
Printing
Rare · SOS · #175
Cheapest printing
€0.11
EDHREC salt
—
Color identity
Green, Blue
Keywords
Increment

Scryfall · EDHREC

Bracket

  • B1 Exhibition — Not in the same deck as its two-card combo partner: Intruder Alarm
  • B2 Core — Not in the same deck as its two-card combo partner: Intruder Alarm
  • B3 Upgraded — Not in the same deck as its early two-card combo partner: Intruder Alarm
  • B4 Optimized — allowed: No restriction beyond the banned list
  • B5 cEDH — allowed: No restriction beyond the banned list

Why

  • Two-card combo with Intruder Alarm (early with Intruder Alarm)

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

227 known combos, one of them two-card.

Combos: Commander Spellbook

Rulings

  • 2026-03-20 · Wizards of the Coast
    Berta's second ability isn't a mana ability. It uses the stack and can be responded to.
  • 2026-03-20 · Wizards of the Coast
    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.
  • 2026-03-20 · Wizards of the Coast
    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.
  • 2026-03-20 · Wizards of the Coast
    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.
  • 2026-03-20 · Wizards of the Coast
    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.
  • 2026-03-20 · Wizards of the Coast
    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.

Rulings: Scryfall · Wizards of the Coast

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