Gems are one of two currencies in MTG Arena and the only currency you can purchase in the store
Its an incredibly rich and tactical experience that promotes creativity, wild and interesting card interactions, and allows players to express themselves and how they like to play through the breadth and depth of a single card game
Thanks to the prevalence of Esper control and Domian in Standard right now, theres a huge amount of demand for Raffines Tower
Part Birds of Paradise, part Scavenging Ooze, part Grim Lavamancer, the Shaman was banned in Modern and Legacy but never broke into Standard or Pioneer, although a critical mass of pseudo-fetchlands will eventually push it into playability
then the effect is just absolutely OP for no reason
Difficulties with the back side are often dealt with by using card sleeves with an opaque back