Bob from Accounting

When Bob from Accounting enters the
battlefield, roll a six-sided die. Install the result
on Bob from Accounting. (Put the die on this
card.)
{1}{r}, {t}: The next time you would roll a
six-sided die this turn, uninstall the result from
Bob from Accounting and use it instead. Then
roll a six-sided die and install the result on Bob
from Accounting.