ΔE 29.5, loose: different enough that you should pick on purpose. Undead Dragon is a little lighter, much more muted, warmer than Plasmatic Bolt.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Undead Dragon is a little lighter, much more muted, warmer than Plasmatic Bolt.
The same difference applies the other way round: Plasmatic Bolt is a little darker, much more saturated, cooler.
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 Plasmatic Bolt on the colour wheel See Undead Dragon on the colour wheel
All matches: Plasmatic Bolt equivalents · Undead Dragon equivalents