The answer to this question is cool. One minor issue is that superscripts seem too close:
\documentclass{article}
\usepackage{amssymb}
\newcommand\fakeslant[1]{%
\pdfliteral{1 0 0.167 1 0 0 cm}#1\pdfliteral{1 0 -0.167 1 0 0 cm}}
\newcommand\mathbbsl[1]{\mathbb{\fakeslant{#1}}}
\begin{document}
$\mathbbsl{M}'\mathbbsl{M}^*\mathbbsl{M}^\dagger$
\end{document}
Can this be fixed? Thanks.


muunits (or at least a font dependent space) rather than a fixed unit likecmso that it works naturally after a font size change such as \small or \large – David Carlisle Feb 27 '20 at 09:45