Persona 5 RoyalEdit
According to Morgana, Will Seeds are coalesced distortions of the Palace Rulers. There are 8 sets of 3 Will Seeds. 3 seeds in each Palace. Each Seed is distinguished by their color, coming in red, green and blue. When all 3 from a single Palace are collected, they will then combine into a Crystal, a Skill Accessory granting useful perks.
When visiting Jose and his shop in Mementos, he can upgrade the Crystals into a Ring. However, he can only do this if their respective Palace has been destroyed, as it's still tied to its distortions. This applies to New Game Plus as well - aside from the Crystal of Sorrow, if the Crystals of the second to seventh Palaces haven't been converted to Rings in the previous play through, Jose will be unable to upgrade them. Jose will also sell missing will seeds from the prior palace for 400 flowers.
The Blue Will Seeds are always defended by a mid-boss. This mid-boss almost always has very high stats and their attacks are usually way above the party's management level. Some of them also have attacks that they do not have when normally encountered out of this specific encounter. Make sure to disable them with status conditions and hit them with Technical if possible.
|Crystal of Lust||Mara (Slime)||Diarama||Moderately restore 1 ally's HP.||6 SP||Kamoshida's Palace|
|Crystal of Vanity||Arahabaki||Brush of Vanity||Nullifies wearer's weaknesses.||Passive||Madarame's Palace|
|Crystal of Gluttony||Cerberus||Marakukaja||Increase party's Defense for 3 turns.||24 SP||Kaneshiro's Palace|
|Crystal of Wrath||Alilat||Speed Master||Automatic Sukukaja at the start of battle.||Passive||Futaba's Palace|
|Crystal of Greed||Melchizedek||Attack Master||Automatic Tarukaja at the start of battle.||Passive||Okumura's Palace|
|Crystal of Envy||Baal||Masukukaja||Increase party's Agility for 3 turns.||24 SP||Niijima's Palace|
|Crystal of Pride||Kali |
|Defense Master||Automatic Rakukaja at the start of battle.||Passive||Shido's Palace|
|Crystal of Sorrow||Fafnir||Life Aid||Recover 8% HP and SP after victory.||Passive||Final Palace|
|Will Ring||Skill||Active Effect||Cost||Passive Skill||Passive Effect|
|Ring of Lust||Champion's Cup||Restores med amount of HP and increases Attack for one ally for 3 turns.||10 SP|
|Ring of Vanity||Bleeding Dry Brush||Forms a barrier that can absorb one attack (except Almighty).||22 SP||Brush of Vanity||Nullifies wearer's weaknesses.|
|Ring of Gluttony||Vault Guardian||Increases Defense for all allies for 3 turns.||20 SP||Vault Guardian||Automatic Tetrakarn/Makarakarn at the start of battle.|
|Ring of Wrath||Wings of Wisdom||Cures all non-special ailments for all allies.||10 SP||Speed Master||Automatic Sukukaja at the start of battle.|
|Ring of Greed||President's Insight||Multiply one ally's next magical attack damage by 2.5.||15 SP||Attack Master||Automatic Tarukaja at the start of battle.|
|Ring of Envy||Gambler's Foresight||Increases Agility for all allies for 3 turns.||20 SP||Gambler's Foresight||Automatic Concentrate at the start of battle.|
|Ring of Pride||Tyrant's Will||Multiply one ally's next Physical or Gun attack damage by 2.5.||15 SP||Defense Master||Automatic Rakukaja at the start of battle.|
|Ring of Sorrow||Guiding Tendril||Down all foes. Only usable during preemptive attack.||40 SP||Life Aid||Recover 8% HP and SP after victory.|
- An unused scene in the coding of the game has the protagonist attempting to sell a Will Seed to Munehisa Iwai. He rejects it due to its sinister looks and redirects him to the shady item trader in Kichijoji. (Who never requests to trade Will Seeds.)