It is pretty hard to deal with and is a potent threat on its own
Her main uses are resting low-cost characters early to activate your Leader or targeting blockers in the late game to set up a lethal attack
Top chase cards include Sightseer #192, Erika's Hospitality #190, Green's Exploration #196, Umbreon & Darkrai #182, Misty & Lorelei #191, Red's Challenge #201
However, it is important to mention that you are not really gaining any tempo from this trade, since when you take a card from your opponent's hand, they are never spending their mana to cast it (unlike a Counterspell, for example, which has a weird Time Walk effect on the opponent, since you not only stop the spell but also force your opponent to spend mana attempting to cast it)
-33.34% Last items in stock Yu-Gi-Oh
So, here is a development example for a 2-card starter with Medius + F.A