However, there are better cards in Magic: the Gathering that offer similar abilities more efficiently, such as Hangarback Walker or Walking Ballista, which provide more versatility and scalability in various situations
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Obscura Charm Streets of New Capenna revamped the Esper play style, and as such we transition from controlling cards to cards that can be used in midrange decks, where Obscura Charm can shine
That said, this does mean you have an obvious (and relatively cheap) first step to take when going about upgrading the deck
(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield