Whenever you attack, target creature gains deathtouch until end of turn.
Whenever one or more creatures you control deal combat damage to a player, create a Treasure token, then look at the top card of that player's library and exile it face down. You may cast that card for as long as it remains exiled. (A Treasure token is an artifact with ", Sacrifice this token: Add one mana of any color.")
Rev is a mono-black aggro/value engine that turns combat damage into resources: every player you connect with hands you a Treasure and lets you steal and cast their top card. Attack wide (or with evasive creatures), spread damage across multiple opponents to multiply triggers, and snowball into an overwhelming card and mana advantage. The deathtouch trigger lets a single attacker trade up and pressures blockers, while Treasures fuel big plays and the exiled cards keep your hand stocked.
Generates explosive card advantage and ramp the more opponents you damage, scaling perfectly in multiplayer pods
Treasures enable mono-black to splash effects, ramp into bombs, and fuel artifact/sacrifice synergies
Deathtouch attack trigger turns small creatures into removal and discourages profitable blocks
Mono-color means consistent mana and access to black's deep removal, tutors, and recursion
Relies on connecting in combat—stalled boards or strong blockers shut off the engine
Needs creatures on the table to function and can be soft to board wipes
Mono-black struggles with enchantment and certain artifact removal
Value is incremental and the deck lacks a built-in combo finish, so it can be outraced by faster decks