ΔE 15.9, loose: different enough that you should pick on purpose. Mindcrime Magenta is a little darker, more saturated, cooler than Blood Chalice.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Mindcrime Magenta is a little darker, more saturated, cooler than Blood Chalice.
The same difference applies the other way round: Blood Chalice is a little lighter, more muted, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Blood Chalice on the colour wheel See Mindcrime Magenta on the colour wheel
All matches: Blood Chalice equivalents · Mindcrime Magenta equivalents