The return of Thor's hammer in Infinity War?

Thor possesses physical powers superior to those of normal Asgardian gods. He has an extended lifespan augmented (although not immortal) by the Golden Apples of Idunn, immunity to conventional diseases, enhanced endurance (Thor's Asgardian metabolism is far greater than a human), superhuman strength ([lifting 100 tons]), which increases further when he succumbs to “warrior’s madness,” a berserker rage, the mindless battle passion that increases a warriors strength tenfold. By chanting and performing an ancient ritual, Thor can also invoke the berserker rage to increase his strength. His skin and bones are several times denser than those of mortals, granting him extreme resistance to injury.

Thor shares a unique bond [1] and affinity with Mjolnir, which has been increased further after Dr. Stephen Strange bound Thor's lifeforce to Mjolnir to repair the hammer [2]. Via this bond, Thor has a strong affinity with the forces of weather and acting as a conduct can channel Mjolnir's powers through himself allowing him to summon lighting from his hands. Thor's affinity with Mjolnir is so strong that even when damaged, as long as there is a significant piece remaining intact, Thor can use Mjolnir's powers. However due to the increased bond via Thor's lifeforce, if Mjolnir were to be damaged, Thor himself would perish. Thor can channel his godly energies/lifeforce through Mjolnir into blasts called “Godforce” so powerful that they can slay even immortals, although it leaves him in a weakened state afterwards.

Thor wears a full body hauberk composed of Asgardian steel. It belt has the Norse symbol of physical health as a belt buckle along with the Norse symbol of Gemini most likely to symbolize his bond with Dr. Donald Blake. [3]

While empowered with the Odinforce, or more accurately called Thorforce since the Asgardian lifeforce resided within Thor, Thor was able to tap into a near-infinite resource of cosmic and mystical power, enhancing all of his powers. With the Odinforce’s vast power, Thor was even able to dent Captain America’s Vibranium/steel alloy shield. At regular intervals (usually occurring once per year) or when using the Thorpower too greatly, Thor would be required to enter the “Thorsleep.” Learning from his father's mistakes, Thor had Falki, Odin's metalsmith, create a casket that contains enchantments that create a coma-like state to replenish and retain mastery over the Thorpower in order to heal more quickly. Once closed, it can only be opened from within. When Thor entered this casket of Thorsleep and into the Thorsleep, Donald Blake emerged from the Void until Thor awoke once again. Thor briefly had mastery of the Norse runes and could use them to break any Asgardian enchantment.

Thor occasionally dons a Belt of Strength, which doubles his strength but weakens him after its use. He also possesses a pair of iron gauntlets to protect him when unleashing Mjolnir’s most potent powers. For extended periods of travel, Thor rides a chariot drawn by the Asgardian goats Toothgnasher and Toothgrinder.

During the period when he was cursed by Hela with brittle bones that would not heal, Thor wore a full body suit of armor composed of Asgardian steel for protection. This armor possessed ancient rune symbols of power emblazoned by lightning upon the armor along with an exoskeleton complete with circuits connected to a series of feedback microcomputers programed to respond to minute changes in electrical conductivity of the nerves to prevent the broken bones from shifting, while allowing Thor to use his arm.


Mjolnir

Mjolnir is a virtually unbreakable hammer enchanted by Odin with various enchantments by augmenting its physical qualities via the Odinforce, the life essence of the Asgardian gods, and forged from mystically uru metal, whose chief properties are durability, the ability to maintain enchantment, and absorb energies. Thor shares a unique bond and affinity with Mjolnir, which has been increased further after Dr. Stephen Strange bound Thor's lifeforce to Mjolnir to repair the hammer. Via this bond, Thor has a strong affinity with the forces of weather and acting as a conduct can channel Mjolnir's powers through himself allowing him to summon lighting from his hands. Thor's affinity with Mjolnir is so strong that even when damaged, as long as there is a significant piece remaining intact, Thor can use Mjolnir's powers. However due to the increased bond via lifeforce, if Mjolnir were to be damaged again, Thor himself would perish. Thor can channel his godly energies/lifeforce through Mjolnir into blasts called “Godforce” so powerful that they can slay even immortals, although it leaves him in a weakened state afterward.
Mjolnir is specially enchanted to prevent it from being wielded by anyone save those who have been found worthy and possess superhuman strength. Thus far, this includes Thor, Odin, Tiwaz, Red Norvell, and Beta Ray Bill. Those who are worthy enough are empowered with Thor's essence held within Mjolnir to gain the powers of Thor. However, in times of need, Thor can will others to lift Mjolnir and overcome this enchantment, allowing them to lift the hammer. Thus far, this includes Steve Rogers, Eric Masterson, and a red and blue costumed adventurer from another universe. While holding Mjolnir together, Thor can empower others with his essence to gain the powers of Thor. Thus far, Eric Masterson has been the only one to receive this enchantment. To anyone else, Mjolnir cannot be lifted from the ground nor wrested from Thor’s grip. This enchantment does not affect non-sentient beings (such as robot drones), but even non-sentient forces must possess some level of superhuman strength to lift Mjolnir. However, without the presence of gravity, anyone can overcome this enchantment and lift, or more accurately “push,” and hold Mjolnir, but can not access or use the enchantments within the hammer.

Wielding Mjolnir, Thor can summon and control the powers of the storm, causing rain, wind, thunder and lightning. Thor can channel the storm’s fury into devastating energy blasts that can destroy even secondary Adamantium. Mjolnir can also generate energy blasts called “Anti-Force.” Due to its uru metal composite, Mjolnir can absorb other energies into itself, which Thor can then release.

Mjolnir can also transform Thor into his civilian guise as Donald Blake by striking the hammer against the ground once. When Thor becomes Blake, and vise-versa, Thor is sent into the limbo-like dimension known as the Void. Mjolnir assumes the appearance of an old wooden cane and in this form Mjolnir can be lifted by anyone. Mjolnir’s enchantments usually restore Thor to Blake’s form if he is separated from the hammer for more than 60 seconds.

By throwing Mjolnir while grasping its leather thong, Thor can simulate flight at speeds up to Mach 32 (over 24,000 mph). Thor can steer Mjolnir’s path via his mental control over Mjolnir while traveling and can “hover” in place by spinning Mjolnir in his hand. While throwing Mjolnir when “hovering,” Thor can use winds to keep himself afloat allowing him to appear to be in flight. Mjolnir obeys Thor’s mental commands, via his bond with the hammer, as though it was alive and, if Thor’s will is strong enough, the hammer can pass through nearly any barrier to reach his hand should he so desire. Once thrown, Mjolnir returns to Thor's grasp when he mystically calls upon it to return to him.

Thor often uses Mjolnir defensively to deflect attacks by spinning it around his body at terrific speeds. By spinning Mjolnir in a circle, Thor can open interdimensional portals, allowing him to travel to other dimensions. Mjolnir has occasionally served as a power source for the Avengers’ Quinjets, enabling them to attain faster-than-light travel. Mjolnir enables Thor to sense the use of magic, particularly Asgardian enchantments. Thor has also used Mjolnir to break spells such as the one that allows the Wrecker to share his power with the Wrecking Crew. Formerly, it could also allow him to travel through time, but Immortus removed this power.