Gail, Blind Executioner

{w}: Gail, Blind Executioner gains vigilance until end of turn.
{3}{g}: Gail gets +2/+2 until end of turn. Activate this ability only once each turn.
Whenever another creature you control would be dealt damage by a creature an opponent controls, if Gail is untapped, you may have him fight that creature. If he wins, prevent that damage.
"No."