No, you can't use Ancient Magicks in F2P OSRS. Ancient Magicks spells remain exclusively available to members in Old School RuneScape.
The Ancient Magicks spellbook becomes available after completing the Desert Treasure I quest, which itself requires membership. Players interested in accessing these spells must first purchase membership.
If you need assistance with membership costs, you can buy OSRS gold from trusted sources like Chicks Gold to fund your subscription.
Free-to-play players can only access the standard spellbook with its basic magic spells. If your membership expires while using Ancient Magicks, the game automatically switches your character back to the standard spellbook.
This change remains in effect even after renewing your membership.
The Ancient Magicks spellbook offers powerful combat spells and unique teleports that set it apart from other magic systems in OSRS. These spells use expensive materials like death and blood runes, making them a significant investment for players who choose to use them.
For free-to-play users interested in magic combat, focusing on mastering the standard spellbook spells provides the best path forward until choosing to upgrade to a membership account.