Story type
Secret Time
Unlocks the story chapter “Starry Witness” once this Memory is equipped.
4★
Xavier: Starry Witness
Memory card · equip on a Love Interest for stats and buff
Owner
Card details
Buff: ATK Stellactrum: Emerald
Position: Solar
Released: 21/02/2024
How to use this Memory
This 4★ Emerald Memory sits in the Solar slot and boosts ATK. Solar slots (max 2 per team) anchor your key pairs and damage; Lunar slots (max 4) round out the team and let you match a battle's required Stellactrum. Equip it on Xavier, then line up its Emerald Stellactrum with your other equipped Memories — each matching point adds +5% (up to +100% at a full match), and meeting the battle's listed Stellactrum lets you break two Wanderer shields at once instead of one. Farm Emerald Protocores and slot them here to push its stats further.
Where to get
Event
How this card is obtained, in detail:
- Oracle of Stars—Traversing Deepspace
Rank-up reward: Ranking this card up gives 30 Diamond each time you spend a copy on it.
Leveling, Ascension & Protocore
Level this card up with Bottle of Wishes, ascend it every 10 levels with an Ascension Crystal matching its Emerald Stellactrum, then Awaken it at level 80. Slot in a matching Protocore for extra stats — Solar cards take α/β Protocores, Lunar cards take γ/δ.
Where to next
FAQ
What does the Xavier: Starry Witness (4★) Memory card do?
It's a Emerald Stellactrum, Solar-slot Memory that boosts Xavier's ATK stat. Equip it on Xavier and match its Stellactrum with your other equipped Memories for the Stellactrum-match damage bonus.
How do I get the Xavier: Starry Witness Memory card?
Check the “Where to get” section above — its confirmed sources are listed there, along with the Wishing Well price if this card is sold there.
