The Restraints of the Round Table (円卓拘束, Entaku Kōsoku?) are thirteen restraints set upon King Arthur's weapons by the Knights of the Round Table, applying to both Arthur Pendragon and Artoria Pendragon. Excalibur Proto for Arthur and Rhongomyniad for Artoria possess the restraints. As stated in Artoria's Interlude in Fate/Grand Order, her Excalibur also possesses them, and it does bear similar conditions to activate its most powerful state.
For Rhongomyniad, over half of the restraints must be released in order to release its True Name. For Excalibur, each condition passed allows for more power to be utilized. For Excalibur Proto, over half of the restraints must be released to achieve a perfect release of its True Name, but even with less than seven restraints released, a weaker release of its True Name is possible.
It is unknown if every single condition is shared between all the weapons or if they vary depending on the world.
|Bedivere||己より強大な者との戦いである||The enemy must be more powerful than oneself|
|Palamedes||一対一の戦いである||The battle must be one-on-one|
|Lancelot||精霊との戦いではない||The enemy must not be an elemental|
|Mordred||邪悪との戦いである||The battle must be one against evil|
|Galahad||私欲なき戦いである||The battle must not involve personal gain|
|Gaheris||人道に背かぬ戦いである||The battle must not be against Humanity|
|Agravain||真実のための戦いである||The battle must be for truth|
|Kay||生きるための戦いである||The battle must be to live|
|Arthur Pendragon||世界を救う戦いである||The battle must be to save the world|
|Unknown||共に戦う者は勇者でなくてはならない||One's comrades-in-arms must be courageous|
|Unknown||心の善い者に振るってはならない||The battle must not be against one pure of heart|
|Unknown||この戦いが誉れ高き戦いであること||The battle must be an honorable one|
- ↑ 1.0 1.1 Fate/Grand Order: Artoria Interlude 2.
Fate/Prototype Tribute Phantasm
"Proto Saber's Excalibur is locked by two seals, one being Barrier of the Wind King, the other being 'Restraints of the Round Table'. Some examples of the Restraints including:
-The battle must be an honourable one
-The enemy must be more powerful than yourself
The seal will be released if more than half of the thirteen Restraints are passed."