Cheapest priced copy (Unfinity): $0.35 at Card Kingdom, near mint, their price list as of .
Xenosquirrels 
Creature — Alien Squirrel · 0/0 · Common · Unfinity · #96
This creature enters with two +1/+1 counters on it.
After you roll a die, you may remove a +1/+1 counter from this creature. If you do, increase or decrease the result by 1.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $1.99 at Card Kingdom
2 rulings from Wizards of the Coast
- 7 October 2022You can change a result to something normally not possible on the die in question, such as a 0 or a 7 on a six-sided die.
- 7 October 2022If you roll the planar die in a Planechase game, you can remove a +1/+1 counter from Xenosquirrels, but you can’t alter the result of the roll.