An alien-like character grabs the orb in one scene to commit suicide. The scene, however, is highly stylised.
When a boy's mother is dying, she looks like she's bleeding.
This has an average amount of violence for an MCU movie. It doesnt have any gore. There are some scenes where large amounts of people are killed by various methods, being blown up, shot, having an arrow shot through their chest and out their backs. Little blood and no gore in every scene.
A man uses his powers to snap an alien's neck around 180 degrees
Fight scenes throughout (hand to hand, laser gun shoot outs and spaceship battles)
A man is tied against a pole. A man goes up to him with a hammer and offscreen we hear a loud bang. Blood runs down the chair after.
A guard uses a cattle prod to shock a man more than once, even after he is lying helpless on the ground.
A tree creature stabs several bad guys and uses them to slam other men to the ground
A prison guard is stabbed through the chest in the background. No blood is shown
A pirate uses a remote-control electronic dart to threaten people and to kill two dozen soldiers, leaving holes in their chests as they fall dead. The dart goes straight through all two dozen, right through their chests.
An orb slowly disintegrates anyone that touches it. This happens about three times throughout the film (no blood is shown, but skin can be seen burning away).