It determines information on what spells pets will have after they are tamed by Hunters.
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1.12.1.5875, 6.0.1.18179
struct CreatureSpellDataRec {
uint32_t m_ID;
foreign_keyⁱ<uint32_t, &SpellRec::m_ID> m_spells[4];
uint32_t m_availability[4]; // Divide by 10 to get in seconds.
};