Cards can be constructed by simply dropping an SVG or 3D model into the world. Cards can be grouped together into decks, where each card provides a unique Capability.
> The cards in the world are organized in a hierarchical parent-children structure. The `_parent` specifies its parent. Note that this is a "logical" structure. All cards are held as a direct child of the Three.JS scene, with automatic matrix composition for nested cards. (The Public Interface of CardActor and CardPawn. github 
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An index card on which one records the responsibilities and collaborators of classes, thus the name,
I represent a deck of Cards.