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Overview

Field Value
Name (EN) Flash Card
Name (JP) フラッシュカード
Rarity Uncommon
Cost $5
Effect Gains +2 Mult permanently per shop reroll (starts at +0 Mult)
Unlock Available from the start (no unlock required)
Trigger Type On shop reroll (permanent growth)
Overall Tier A (A+ in reroll builds)

Rating & Analysis

Flash Card grants +2 Mult permanently per shop reroll (starts at 0). At Uncommon $5, 20 rerolls = +40 Mult, 50 rerolls = +100 Mult — a long-term scaling axis driven by economy.

The dream pairing is the reroll axis: Chaos the Clown (1 free reroll per shop) + Flash Card = ~24 free rerolls per run = +48 Mult guaranteed. Buffoon / Reroll Surplus vouchers cut reroll cost; Golden Joker / Yellow Deck pay for the rerolls.

Blueprint / Brainstorm copy with independent counter = double growth speed. Tier lists rate A overall, A+ in reroll-axis builds. $5 for permanent +Mult scaling is theft — buy early.

Deck Ratings

Deck Rating Notes
Yellow A+ $10 start enables reroll axis early
Anaglyph A Double Tag duplicates Enhancement Tags
Red / Blue A Stable on standard decks
Plasma A Chip averaging amplifies +Mult
Black A +1 slot — reroll axis expansion

Good Joker Synergies

Joker Why
Chaos the Clown 1 free reroll per shop — Flash Card combo perfect.
Golden Joker $4/round — funds rerolls.
Bull / Bootstraps $5 held → +Mult — money-to-damage.
Seed Money / Money Tree Interest cap up — reroll funding.
Blueprint / Brainstorm Independent counter — doubles growth speed.
Fortune Teller +Mult per Tarot — Tarot-axis parallel.

Recommended Builds

Build Core Loop Target Consumables
Reroll axis Flash Card + Chaos the Clown + Golden Buffoon Voucher
Economy + damage Flash Card + Bull / Bootstraps + Golden Strong tags
Long-term scaling Flash Card + Lucky Cat + Supernova Enhancement Tarots
Blueprint stacking Flash Card + Blueprint = double growth Black Hole / The Soul

Tips & Usage

  • Buy early to maximize lifetime +Mult accumulation.
  • Chaos the Clown combo gives effective "free +2 Mult/shop".
  • Buffoon / Reroll Surplus vouchers cut reroll costs.
  • Blueprint to its right gives independent counter — doubled growth.
  • Pair with economy-axis Jokers to fund rerolls.

Caveats

  • Starts at 0 — slow ramp early-game.
  • Reroll-dependent — value drops once build is locked.
  • Avoid Perishable — losing growth-momentum is critical.
  • Eternal locks the build path but persistent growth is fine.
  • Chaos the Clown's free reroll counts toward growth (verify in current patch).