IIHGuessr

Train your Magic: The Gathering draft skills by comparing card values

What is IIH?

IIH (Improvement In Hand) measures how much a card improves your win rate when you draw it. Data comes from 17lands.com, aggregated from thousands of real BO1 Premier Draft games on MTG Arena.

A card with +5% IIH means drawing it improves your win rate by 5 percentage points compared to not drawing it.

How to Play

  1. Two cards appear side-by-side
  2. Click the card you think has higher IIH
  3. See if you're right and learn the actual values
  4. Build streaks and track your accuracy
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Understanding IIH Limitations

IIH measures correlation, not causation. This data is from BO1 Premier Draft on MTG Arena and may not apply to BO3 or other formats. It's a powerful metric but has important limitations:

  • Aggro bias: Fast decks often win before drawing cards matters, giving low-mana-value cards artificially low IIH
  • Situational cards: Niche cards (like artifact destruction) can have inflated IIH because they're only played in winning situations
  • Archetype paradox: Medium cards in top-tier archetypes may have low IIH because the deck wins anyway

View data visualizations →Learn more about IIH methodology →