>High Universe level physically (The clash between Horus and the Emperor potentially shattered the infinite realm of the Lupercal Court)
>Up to High Hyperverse level with psychic powers (Compressed all of time, space, and the infinite angles of material space into a single fractal point. Twisted all of the pasts, presents, and every possible future into a single, simultaneous, solid ball. Horus' power is stated to be infinite compared to the Emperor's finite power.
>Created the Lupercal Court which is consistently described to be infinite in scale