Look at Me, I'm R&D - Unhinged - 17

Enchantment

Mana Cost: {2}{W}

As this enchantment enters, choose a number and a second number one higher or one lower than the first number.
All instances of the first chosen number in the full text of each permanent, spell, and card in any zone are changed to the second chosen number.

Rare · Unhinged · #17 (UNH)