"Why build a bridge that needs to be guarded?"
—Elvish champion

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can't attack.

"I expected a fight, but I didn't expect it from the building itself."
—Gerrard

Mystery Booster 2

The way out lay across a slender bridge of stone. It was an ancient defense of the Dwarves that could only be traversed in single file.

Tales of Middle-earth Commander

"When I said I needed a hand, I didn't mean this."
—Gerrard Capashen

Double Masters

Ensnaring Bridge's effect checks the number of cards in your hand only while a player (including you) is declaring attackers. Once a creature has legally attacked, changing its power or the number of cards in your hand won't remove it from combat.