Each tribal card has another card type. Playing and resolving a tribal card follows the rules for playing and resolving a card of the other card type.
Tribal subtypes are always a single word and are listed after a long dash: “Tribal Enchantment — Merfolk.” The set of tribal subtypes is the same as the set of creature subtypes; these subtypes are called creature types. Tribals may have multiple subtypes. (You can find the complete list of tribal subtypes under “Creature Types” in the glossary at the end of this document.)