Rats in Magic: The Gathering are often depicted as disease-ridden scavengers
Hexproof became the more popular keyword because it allows the person controlling the card to target it with spells and abilities while blocking those of opponents
For reference, a Special Illustration Rare lands around 1 in 90 packs, an Ultra Rare around 1 in 15, an Illustration Rare around 1 in 12, and a Double Rare around 1 in 5
A similar card in Fusion Strike that has a more general use is Adventurers Discovery: instead of searching for Fusion Strike Pokmon to put into the players hand, Adventurers Discovery allows them to put up to three Pokmon V from their deck into their hand instead
For two white mana this 2/1 legendary creature tutors an Equipment card into your hand when he enters
Also, dont be surprised to see E-Reader cards making a comeback: an official Pokemon teaser video featured E-Readers as being part of the Pokemon 30th Celebration set likely to come out later this year