The SSS-Rank Hunter's Lucky Draw - Vol. 3 Ch. 85

[MangaDex]

 

[eng1]

His level was over 500, orchi was 299. Even with 99% reduction, orchi should have been 1 shot as levels don't scale linear

 

[Mephis_to]

His level was over 500, orchi was 299. Even with 99% reduction, orchi should have been 1 shot as levels don't scale linear

I think that the level of Susanoo didn't "pass on" to MC hence that's why Orochi wasn't killed in 1 shot

(Only my assumption, I don't know if the level of a card being passed on to MC was detailed in earlier chapters or just wasn't explained)

 

[eng1]

He gains their stats, which is effectively same thing