Krark's Other ThumbHow it works & interactions with other cards

Twice the Fun, Half the Risk

Krark's Other Thumb replaces any single die roll with a choice between two results. Whether you are rolling a six-sided die, a twenty-sided die, or even a planar die, this artifact intervenes. You roll two dice of the same type and choose which one to keep, effectively giving you 'advantage' on every roll you make during the game.

Step-by-Step Resolution

When an effect instructs you to roll a die, the replacement effect of the Thumb kicks in immediately. First, you perform two physical rolls instead of one. Second, you evaluate both results and choose one to be the 'official' roll. Third, the ignored result is treated as if it never happened—it won't trigger any abilities that care about die results, and it doesn't count toward any totals.

Navigating Multiple Rolls

If an effect tells you to roll multiple dice at once, Krark's Other Thumb applies to each die individually. You will roll two dice for every one die requested. It is helpful to use different colors or roll them in pairs to ensure you know which ignored result belongs to which kept result. This also applies to rerolls; if you are allowed to reroll a die, the Thumb will once again let you roll two for that reroll.

Strategic Implementation

You should play Krark's Other Thumb early in the game to maximize its value across all subsequent turns. Because it is a cheap legendary artifact, it is easy to cast and provides a passive benefit that doesn't require mana to activate. It is best used in chaotic environments where high rolls lead to massive advantages or where low rolls might result in detrimental penalties.

Interaction examples

Establishing Your Mana Base

Sol Ring

With Krark's Other Thumb on the battlefield, you can use Sol Ring to generate the two mana needed to cast another spell that requires a die roll. The Sol Ring provides the stable resources necessary to keep your luck-based engine running without interruption.

Fixing Your Colors

Arcane Signet

If you are playing a multi-color deck that uses die-rolling mechanics, Arcane Signet ensures you have the correct colors to cast Krark's Other Thumb. Once the Thumb is out, every future die roll you make—regardless of the source—will benefit from the ability to roll two dice and ignore one.

Basic Die Rolling

If you play a spell that says 'Roll a d20,' the Thumb changes this to 'Roll two d20s.' If you roll a 3 and a 19, you can ignore the 3. The 3 never happened, so abilities that trigger on rolling a 3 will not activate, and the game proceeds as if you only ever rolled a 19.