Let's take a look at two different Location cards, both included in the Ruby & Sapphire deck: As you can see from the above, these cards have a cost in Ink to play them (and both of these examples can be used as ink in your inkwell)
Balefire Liege Bedlam Reveler Conduit of Storms Cryptborn Horror Dread Slag Frenzied Gorespawn Grief Tyrant It That Gets Left Hanging Kederekt Creeper Kraum, Ludevic's Opus Kraum, Ludevic's Opus Kraum, Violent Cacophony Mindwrack Liege Obosh, the Preypiercer Overlord of the Boilerbilges Pink Horror Possessed Barbarian Sadistic String-Puller Sauron, Lord of the Rings Sauron, the Dark Lord Sauron, the Lidless Eye Scourge Wolf Shambling Remains Skin Shedder Smoldering Werewolf Solphim, Mayhem Dominus Spawn of Rix Maadi Spider-Islanders Storm Skreelix Stromkirk Occultist Tsabo Tavoc Vildin-Pack Outcast Wandering Mind
As its hexproof renders combat damage the most reliable means of dealing with this Kraken, this puts opponents in a lose-lose situation, due to the fact that if it's blocked, its controller will draw cards, and if it isn't, this Kraken will deal notable damage.
Heartfire Hero, Abuelos Awakening, Hopeless Nightmare, and This Town Aint Big Enough were largely dependent on Standard synergies and have limited appeal elsewhere, destining them for the bulk bins