Britain, the Tax Collector

Haste
Whenever a permanent enters the battlefield under
an opponents control, create a treasure token if its
mana value is greater than the number of treasures
you control.
{x},{2},{t}: Reveal the top X cards of your library.
Put into your hand any number of permanents with different names from among them with total mana
value Y, where Y is the number of treasures you
control. Put the rest on the bottom of your library
in a random order.