Feodality

Whenever an opponent taps a land for mana, put
a tax counter on Feodality.
Remove 5 tax counters from Feodality: create a
gold token.
Remove 7 tax counters from Feodality: create a
2/2 white knight creature token with vigilance.
Remove 10 tax counters from Feodality: draw a
card.

"Whether it's with gold, men or service, your debt shall
be payed."