Venal Moneyman

Venal Moneyman enters the battlefield with one
income counter on it.
Whenever an opponent taps a nonland card for
mana, you may pay {1} and put an income
counter on Venal Moneyman.
{t}, add {x} where X is the amount of income
counters on Venal Moneyman.
Perhaps, we can work something out...