Enhanced Physical Abilities: Venom’s symbiote grants its host enhanced strength, speed, agility, and durability. When combined with the cosmic entity’s power, Doctor Strange would become virtually invincible, capable of overpowering almost any opponent physically.

Reality Manipulation: Doctor Strange’s mastery of the mystic arts combined with the cosmic entity’s power would likely amplify his reality-altering abilities. He could reshape reality on a cosmic scale, bending it to his will and potentially rewriting the fabric of existence itself.

Cosmic Awareness: The cosmic entity’s power often grants its host vast knowledge and awareness of the universe. With this knowledge, Doctor Strange would possess an unparalleled understanding of cosmic forces, cosmic entities, and the workings of the multiverse. This would greatly benefit him in his role as a protector of reality.

Corruption and Dark Influence: Venom’s symbiote is known for its corrupting influence on its hosts, often driving them towards darker and more violent tendencies. If Doctor Strange were to succumb to this influence, his actions could become more ruthless and destructive, potentially endangering the very reality he is sworn to protect.

Cosmic-Level Threat: With such immense power at his disposal, Doctor Strange would become a cosmic-level threat to the universe. His abilities could rival or even surpass entities like Galactus or the Celestials, making him a force to be reckoned with on a universal scale.

Balancing of Power: The combination of Venom’s symbiote and the cosmic entity’s power might be too much for any one individual to handle. The cosmic entity might seek to balance the power or exert some control over Doctor Strange, leading to a constant struggle for dominance within his own mind.

Overall, the fusion of Venom’s power and the cosmic entity’s might would elevate Doctor Strange to a cosmic-level being with reality-altering abilities. The extent of his power would heavily depend on the specific characteristics and limitations of the cosmic entity and the symbiote, as well as Doctor Strange’s own ability to control and balance these immense powers.