There's just so much library searching in EDH, whether from tutors, fetch lands, or forced searchs off cards like Field of Ruin
Those lands are then converted into card advantage, as The Gitrog Monster lets you draw a card whenever one or more of your lands are put into your graveyard
Grima is very difficult to counter, however, as more and more cards were released in later sets, several strategies became possible to deal with this minion, most of which can also be used against Enquea, LoM, like Rush of Steeds
If the creature these Auras are enchanting dies, the Aura will also be destroyed and go to the graveyard
Some bring back beloved mechanics, which will impact some of Magics most popular older formats such as Modern and Commander
But sometimes, it can be difficult to let go and make bold decisions on the fly