[5NL] A7s...blind vs blind...limped pot...line check.

Well yes it's a steal, and as backup we have a playable hand even OOP in case he calls, as long as we're not stacking off on an A high board.

Assuming you raise it to 3bb, how often do you need villain to fold for making a pure bluff +EV? Assume that every time he continues (calls or raises), you lose.