Grinch, Thief of Christmas

This creature can't be blocked.
At the beginning of your end step, put a Thief
counter on Grinch, Thief of Christmas.
{2}{b}{r}: Put a Thief counter on Grinch, Thief of Christmas.
Remove ten Thief counters from Grinch, Thief
of Christmas: gain control of each artifact and enchantment your opponent's control.