Rules Update (Nonfunctional): New Concepts "Tiny" and "Cost Identity"

 The recent rules update generated a lot of questions, both within the community and within the Committee. This article goes into depth regarding the behind-the-scenes discussions and process of that update. The full CR has been updated with the following changes:

906.4:  TL:R uses cost identity to determine if a card is “Tiny”, or legal in the format. The cost identity of a card is the set of mana values of each set of characteristics of each face of that card. A card is considered “Tiny” if each value in its cost identity is 3 or less. See rule 202 “Mana Cost and Color”.

906.4a: The cost identity of a split card consists of the mana value of each half. See rule 709 “Split Cards.”

906.4b: The cost identity of a modal double-faced card consists of the mana value of each face. See rule 712 “Double-Faced Cards.”

906.4c: The cost identity of a card with alternative characteristics includes each set of alternative characteristics. See rules 715 “Adventure Cards”, 718 “Prototype Cards”, and 720 “Omen Cards.”

Section 906.5 has been reorganized to accommodate these changes.