The MTG Arena code card in the Welcome Booster provides a code for the Sneak Squad deck in MTG Arena.
1 Blade of the Oni
1 Malevolent Hermit // Benevolent Geist
1 Mirrorhall Mimic // Ghastly Mimicry
1 Aven Heartstabber
1 Hypnotic Grifter
3 Lantern Bearer // Lanterns' Lift
2 Covetous Castaway // Ghostly Castigator
2 Psychic Pickpocket
3 Raffine's Silencer
2 Covert Cutpurse // Covetous Geist
3 Dreadhound
3 Snooping Newsie
2 Syndicate Infiltrator
1 Cemetery Tampering
2 Consider
2 Undying Malice
2 Murder
2 Deal Gone Bad
2 Tainted Indulgence
3 Obscura Storefront
4 Waterfront District
2 Dismal Backwater
8 Swamp
7 Island