An emerald card, Belle, Hidden Archer comes into play at the cost of five ink, and cant be added to your inkwell
Prince Eric, Expert Helmsman is nice and mobile as well, acting as a quester that your opponent will hesitate to get rid of if youre in a position of control, or as a more aggressive banisher when you need to deal with your opponent
Some of them have powerful abilities that can lock out an entire opposing strategy, such as Gaddock Teeg
But I think the problem with this creature lies in that you have to give up other nonland permanents, which will be hard to come by if youre already a token deck
Equipment that can become creatures have the reconfigure ability, which lets you pay a mana cost to switch between modes.
Wonder (Odyssey/Torment/Judgment) Odyssey Block dealt heavily in the graveyard, between threshold, flashback, madness (discarding cards) and the Judgment Incarnations