"Her talent for slipping unseen behind enemy lines provided information that would prove crucial to Dominaria's defense."
—*Heroes of the Second Invasion*

Tetsuko Umezawa, Fugitive

Creatures you control with power or toughness 1 or less can't be blocked.

The List

"My ancestor Toshiro used to say, 'Life is a series of choices between bad and worse.' I'm a master of making great bad choices."

Bloomburrow Commander

Commander Masters

Once a creature you control has been blocked, changing its power to 1 or less won't cause it to become unblocked. Changing its toughness to 1 won't cause it to become unblocked, and changing its toughness to less than 1 will cause it to die.