No self-respecting criminal has a basement with only one exit.

Escape Tunnel

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{T}, Sacrifice this land: Target creature with power 2 or less can't be blocked this turn.

Edge of Eternities Commander

Murders at Karlov Manor

{T}, Sacrifice Escape Tunnel: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{T}, Sacrifice Escape Tunnel: Target creature with power 2 or less can't be blocked this turn.

If the target creature's power is increased to 3 or greater after Escape Tunnel's last ability is activated but before it resolves, the ability doesn't resolve. However, if instead the creature's power is increased to 3 or greater after the ability resolves, it still can't be blocked that turn.

Once a creature with power 2 or less has been blocked, Escape Tunnel's last ability won't cause it to become unblocked.