How do I customize my creature

[Tissy]

I heard by customizing the totem I could customize a creature. But I don’t see any operation on a totem. 

[Muratus del Mur]

Two of the ways you could customize a creature is when you upgrade it, you can sometimes give it a custom name, and if you have creature shards of that species, you can get additional abilities on that creature.

Other ways to enhance a creature are tokens, but since they are not selectable as exact options on a specific creature, i don't consider these as customizing, but just enhancing.