Any game effect resulting in two or more characters occupying the same square, or characters, terrain markers, or objects occupying a square of blocking terrain, is prohibited (except for Debris markers, see Terrain p.12). If part of a game effect would cause this to happen, that part of the game effect is ignored. If moving or placing a character, terrain marker, or object would cause this, then the character, terrain markers, or object must instead move to or be placed in a different square. Characters using certain powers and abilities may freely travel through other characters and/or blocking terrain, but if it will end its movement in the same square as another character or blocking terrain, the moving character must end its movement before entering the occupied square.