\documentclass[a4paper,landscape]{article}
\usepackage[margin=6mm,top=5mm]{geometry}
\input{libs.tex}
\input{colors.tex}
\input{tikzcards.tex}
\usepackage{standalone}
\begin{document}
\begin{center}
\pagestyle{empty}
\includestandalone{cards/en/potions/alchemist}
\includestandalone{cards/en/potions/brewery}
\includestandalone{cards/en/potions/courier}
\includestandalone{cards/en/potions/heal_potion}
\includestandalone{cards/en/potions/potion_of_rage}
\includestandalone{cards/en/potions/potion_of_speed}
\includestandalone{cards/en/potions/potion_of_strength}
\includestandalone{cards/en/potions/potion_of_visibility}
\includestandalone{cards/en/potions/potion_of_vulnerability}
\includestandalone{cards/en/potions/toxic_gas_vial}
\includestandalone{cards/en/potions/vial_smasher}
\end{center}
\end{document}