mtg removal cards Lorwyn Eclipsed: Guide and all other Auras attached to attacking creatures your opponents control. Rules Text: Remove a counter,

Now, onto the lands themselves

The card can enter the Inkwell already exerted, and your opponent must choose one of your characters with the Bodyguard trait

So Rattleclaw Mystic may do good work in providing another source of ramp

Effects like the Historic banned Spreading Seas can fix this and, since Islandwalk is a recurring mechanic across Merfolks, it is probably worthwhile running some effects like that, making Master of the Pearl Trident an absolute menace

Of course, good will alone wont win you the game, so Font of Mythos will only be a good fit in decks that know what to do with the extra cards they draw (or how to punish foes for being flooded with cards)