I've Escaped, You See, Into A World Of Right Angles

Postcard credit: Brave New World (Aldous Huxley, 1932; cover by Denis Piper, 1963).

Token: Minecraft.

Magnet: Sylvian TK.

Card: "New World Formation" from the Yu-Gi-Oh! Trading Card Game - Duelist Nexus (2020), card game published by Komani.