(The turn you must wait to use a freshly-played character while they dry is also a much cuter image than Magics summoning sickness.) Being able to add a facedown card from your hand to your inkwell immediately overcomes the common MTG and Pokmon bugbear of finding yourself with no land or energy cards - any Lorcana card with the ink marker around its cost can be turned into ink - and sparks a delicious dilemma about which cards to sacrifice to the inkwell in order to play others
Its also hilarious with Grismold, the Dreadsower
That works very well with the massive loyalty gain from the death-ery
Static Prison Three turns is forever in Modern
Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45