I saw this movie in late 60's or early 70's
The four fighter are in hiding, training to take on an army, One trains by jumping out of a grave like hole filled with water, soon he can jump out of one to another then he can run on water, another trains by braking rocks soon he can pick up very large rocks and brakes them, although he get's killed in the end by arrows to his mid section. Only after he held off the army and killing a lot of them, he pulls very large blocks from a castle like wall using them as a weapon, then pushing the wall onto the military men, I don't remember much about the other two, it's just been way to long ago. Maybe someone can help.. Thanks

Four Assassins . It is also known as Marco Polo.