CATEGORY TEAM
Ingenious inventions
Choose any three different Artifacts cards.
Example lineup · Any three different cards from this category count.Formation guideBrowse all 30 eligible cardsSlide rule
Common cardA slide rule is a hand-operated mechanical calculator consisting of slidable rulers for conducting mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry.
A place in your collection
Slide rule is one of 30 discoveries in the artifacts set. Find this card in a free discovery pack, or exchange 4 same-rarity duplicate cards from your collection to craft it.
Its collectible power is 1250 and its shield is 580. Its health is 3480. These stats are derived from English Wikipedia data using capped game formulas. In battle it favours the Feint stance, like all Artifacts cards. Daily quiz results depend on your answers.
Open a discovery packRead about Slide rule on WikipediaArticle description adapted from Wikipedia, available under CC BY-SA 4.0; shortened for the card. Revision and contributors are linked below.
Team combinations
Arena formations · 2 in one category: +3% ATK/DEF. Three: +6% all stats. A complete family or story: +10% all stats. Strongest bonus only.
Abacus
Analytical engineBEHIND THE DISCOVERY2026-10-06
A card. A real story.
Read on WikipediaOriginal article · English WikipediaA slide rule is a hand-operated mechanical calculator consisting of slidable rulers for conducting mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry.
ATTACK · 1,25037,308views · 90 days
DEFENSE · 58052citation entries
HEALTH · 3,4805,712article words
How these stats are calculated
English Wikipedia · 2026-07-09 – 2026-10-06. Views use Wikimedia’s “user” traffic classification, not unique visitors. Quality marker: not rated in this snapshot.
Stats use capped logarithmic scaling. Attack: 800–1,600 from daily views (cap 50,000). Defense: 200–800, weighted 80% citations (cap 300) and 20% quality marker. Health: 2,400–3,600 from prose words (cap 15,000). Values are rounded to tens. Citations indicate documentation volume, not verified truth. No rarity multiplier applies.
Snapshot wiki-2026-10-06-v1 · imported 2026-10-08. Live Wikipedia may have changed. Stats remain fixed until a new edition is released; an active duel keeps its starting stats.
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Image: ArnoldReinhold. CC BY 2.5. Resized and converted to WebP; cropped in card layouts. Original image and attribution.