It was given out as a participation prize at Disney Lorcana Challenge regional events for all players who played three rounds of the main event
Each card in the Inkwell is worth just one Ink, and players are able to Exert (turn sideways) as many cards in the Inkwell as necessary to pay Ink costs

Blackcleave Goblin Blight Mamba Blighted Agent Blightsteel Colossus Blightwidow Burn the Impure Carrion Call Chained Throatseeker Contagious Nim Core Prowler Corpse Cur Corrupted Conscience Cystbearer Fallen Ferromancer Flensermite Flesh-Eater Imp Glistener Elf Glistening Oil Grafted Exoskeleton Hand of the Praetors Happy Dead Squirrel Ichor Rats Ichorclaw Myr Inkmoth Nexus Lost Leonin Melira, Sylvok Outcast Mindcrank Necropede Ogre Menial Pestilent Souleater Phyresis Phyrexian Crusader Phyrexian Digester Phyrexian Hydra Phyrexian Juggernaut Phyrexian Swarmlord Phyrexian Unlife Phyrexian Vatmother Plague Myr Plague Stinger Priests of Norn Putrefax Razor Swine Reaper of Sheoldred Rot Wolf Scourge Servant Septic Rats Shriek Raptor Skithiryx, the Blight Dragon Skithiryx, the Blight Dragon Spinebiter Tainted Strike Tangle Angler Tel-Jilad Fallen Tine Shrike Toxic Nim Trigon of Infestation Triumph of the Hordes Vector Asp Viral Drake Viridian Betrayers Viridian Corrupter Whispering Specter

Land Land (CTRL to add secondary) Protection Gisela, Blade of Goldnight Flying, first strike If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead
Make sure to add flicker cards like Thassa, Deep-Dwelling that specify the creature returns under your controlnot its owner's controlso that you can keep the recruited creatures forever
As demand for One Piece trading cards continues to rise globally, sealed booster boxes are becoming highly sought-after collector items with strong long-term value potential.