For Gameplay and Custom Deckbuilding Competitive players often build decks with matching foil styles for consistency
It's most often played in decks that can ramp into it quickly, most notably Eldrazi Breach decks in Modern, and pops up in niche Sneak and Show builds in Legacy
Cait Sith, Fortune Teller, Hermes, Overseer of Elpis, Aqueous Form, Compassionate Healer, and Princess Yue each offer a low bar for scry each turn and get you lots of triggered value
She saw consistent play as a reanimation target 25 years ago and served as a top-end for control decks who didn't mind tapping seven mana for an extremely resilient threat
But its impossible to talk about Arena without bringing up the games economy, which is by far what raises the most questions