Cheapest priced copy (Unfinity): $0.49 at Card Kingdom, near mint, their price list as of .
Vedalken Squirrel-Whacker 
Creature — Vedalken Guest · */* · Rare · Unfinity · #63
As this creature enters, roll a six-sided die twice. Its base power becomes the first result and its base toughness becomes the second result.
If you would roll one or more six-sided dice, instead roll them and you may exchange one result with this creature's base power or base toughness.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
10 rulings from Wizards of the Coast
- 7 October 2022The two die rolls to set initial base power and toughness are separate and sequential. If you want to reroll the first die, you must do so before you roll the second die.
- 7 October 2022If a die is rerolled, the original roll essentially never happened: it doesn't cause any abilities to trigger, and no effect that cares about die rolls will consider it.
- 7 October 2022Some effects may modify the result of a die roll. This may be part of the instruction to roll a die, or it may come from other cards. Anything that references the "result" of a die roll is looking for the result after these modifications.
- 7 October 2022Results can be numbers not ordinarily possible on a six-sided die. Spells like Scooch can change the result to 0 or 7, for example.
- 7 October 2022Vedalken Squirrel-Whacker's second ability functions only while Vedalken Squirrel-Whacker is on the battlefield. Specially, the second ability can't affect rolls of the first ability.
- 7 October 2022If an ability triggers "whenever you roll a die," it will trigger whenever you roll any die, including the planar die. This is a change from previous Un- rules. Some abilities use the result to determine part of the effect. If you get a non-numerical result (currently just the planar die, but the future is long), that part of the effect won't do anything.
- 7 October 2022If Vedalken Squirrel-Whacker's base power or toughness changes through some other means, it is possible to exchange a die roll so that it has a result that would normally not be possible for that die, such as, on a six-sided die, a result of 9, or 42, or -3. These are all perfectly reasonable results on a six-sided die.
- 7 October 2022Each die is identified by the number of faces it has. A six-sided die is a die with six equally likely outcomes: 1, 2, 3, 4, 5, and 6. The roll must be fair. Although physical dice are recommended, digital substitutes are allowed except in cases where the physical die is required for the effect.
- 7 October 2022After rolling one or more six-sided dice and seeing the results, you decide whether you want to make the exchange. You may exchange one result at most, no matter how many dice you rolled. For example, say Vedalken Squirrel-Whacker is a 2/5 and you roll a 3. You could make Vedalken Squirrel-Whacker a 3/5 and change the die roll result to 2, make it a 2/3 and change the die roll result to 5, or leave everything how it was.
- 7 October 2022Something in the game must tell you to roll a die. If you roll a die for any other reason (to simulate a coin flip, to choose pizza toppings, to create alternate timelines), that roll doesn't count.