In this rule

Historical Rules · 17 November 2023

Rule 205.3b

Official source text from the 17 November 2023 Rules release

Permalink

Subtypes of each card type except creature and plane are always single words and are listed after a long dash. Each word after the dash is a separate subtype. Subtypes of creature cards are one or two words and are listed after a long dash. Each word or two-word phrase, as listed in rule 205.3m, is a separate subtype. Objects other than planes may have multiple subtypes. Subtypes of planes are also listed after a long dash, but may be multiple words; all words after the dash are, collectively, a single subtype. Example: “Basic Land — Mountain” means the card is a land with the subtype Mountain. “Creature — Goblin Wizard” means the card is a creature with the subtypes Goblin and Wizard. “Artifact — Equipment” means the card is an artifact with the subtype Equipment.

Find this number in the current Rules