When it comes to combat, their powers could complement each other. Harry's magic gives him a wide range of offensive and defensive spells. Percy, on the other hand, has his sword fighting skills along with his demigod powers. In a battle, Harry could cast protective spells around Percy as he charges into the fray with his sword. Percy's ability to communicate with sea creatures could also be used to gather intelligence, which Harry could then use to plan their magical strategies better.
Well, Harry's magic and Percy's demigod powers could combine in some really cool ways. For example, Harry could use a spell to create a distraction while Percy uses his water - controlling abilities to attack the enemy from a different angle. Or Percy could use his super strength to hold an enemy in place while Harry casts a powerful offensive spell.
Harry's ability to apparate could be very useful in getting them out of tight spots quickly. Percy's power over water could also be used to help them escape. For instance, if they are surrounded by enemies, Percy could create a large wave to sweep them away, and then Harry could apparate them to a safe location. Also, Harry's Patronus charm, which is a manifestation of positive energy, might be able to interact with Percy's connection to the gods in a way that boosts their combined strength when facing dark forces.
Their powers might also combine in more complex ways. Harry's Patronus, which is a manifestation of positive energy, could interact with Percy's ability to sense and manipulate emotions related to the sea. When they are in a tough situation near a large body of water, Harry's Patronus could give Percy the extra boost of positive energy he needs to control the sea in a more powerful way, like creating huge tidal waves against their foes.
Percy's water - based powers could be used in conjunction with Harry's magic. For example, if they were facing a fire - based enemy, Percy could summon water to douse the flames while Harry used spells to immobilize it. Harry's magic could also enhance Percy's powers in some ways. Maybe Harry could use a spell to make Percy's water attacks more powerful or accurate.
Their combined powers could work in various ways. Since Percy has a connection to the gods and can communicate with sea creatures, he could call upon them for help. Harry, with his magic, could then enhance the abilities of those creatures. For example, he could use a spell to make a hippocampus (a sea - horse - like creature in Percy's world) fly faster or have stronger attacks. This way, they are using both their demigod and wizard powers in harmony.
Percy's power over water could be used in combination with Amaterasu's sun - based powers. For example, if they were facing a fire - based enemy, Percy could create a mist or a large body of water to cool things down while Amaterasu's sunlight could evaporate the water, creating a powerful steam - based attack.
Percy's power over water could potentially be combined with Sirius' Animagus form. For example, Sirius in his dog form could swim faster in water controlled by Percy. Also, Percy could use water to create distractions or barriers in a fight, while Sirius could use his werewolf - fighting skills and speed to take on enemies that get past Percy's water defenses.
Percy's ability to communicate with sea creatures could prove useful in Hermione's world too. He could ask the mermaids in the Hogwarts lake for information, and Hermione could use her magic to translate if there are any language barriers. And on the other hand, Hermione's magic could help Percy when he's in a situation where his demigod powers alone aren't enough. For example, she could use a spell to make him invisible when he needs to sneak around in a place where his powers might be detected.
Percy's powers are based on water and his demigod abilities. Thanos has the power of the Infinity Stones. If they were to interact, Percy's water could potentially disrupt Thanos' use of the Power Stone's energy blasts. For example, water could absorb or deflect the energy.
The magic in Harry Potter and the demigod powers in Percy Jackson could interact in really cool ways. For example, a wizard's spell of protection could be enhanced by a demigod's aura of strength. If a demigod was in a fight at Hogwarts, a wizard could cast a spell to make the demigod's weapon more powerful, like making Percy's sword glow with an extra magical edge.
Well, Percy's power over water is a very versatile thing. He can make water do all sorts of things like form into weapons or shields. Kratos, with his insane strength, can break through almost anything. In a fanfiction scenario, their powers could combine in battle. Let's say they're facing a horde of fire - based monsters. Percy could call up a huge wave of water to douse the flames, and then Kratos could rush in with his blades and start slashing away at the weakened foes. Also, Percy's ability to heal himself in water could be a great asset if Kratos gets injured. He could find a body of water and help Kratos recover, while Kratos could protect Percy during the process.
Percy's water - based powers could interact interestingly with Thor's lightning. For example, water is a great conductor, so if Thor were to strike Percy's water constructs, it could create a powerful blast. Or Percy could use his control over water to create a shield against Thor's lightning, diffusing it in a spectacular show of power.