Risky Boots

When an opponent draws a card, they reveal
their hand. You may steal a nonland permanent
from their hand to put into yours. Nonnumerical
Mana symbols in the casting cost of stolen
permanents become {b} as long as it is in your
hand.
At the beginning of your upkeep, put X+2 2/2
Black and White Tinkerbat tokens onto the battlefield, where X equals the amount of
Tinkerbats under your control.