, Return an unblocked attacking Rogue you control to its owner's hand: Put this card from your hand onto the battlefield tapped and attacking.
Whenever Zareth San deals combat damage to a player, you may put target permanent card from that player's graveyard onto the battlefield under your control.
Build a wide, evasive Rogue board, mill opponents to stock their graveyards, then connect with Zareth San to steal their best permanents for free. He repeatedly re-enters combat by bouncing an unblocked Rogue, so each combat can swing the game by stealing planeswalkers, bombs, or lands.
Repeatable graveyard theft of any permanent type, including from your own mill
Flash and the bounce ability make him hard to kefor opponents to permanently remove
Rogues and mill synergize, fueling both card advantage (Faerie Rogue tribe) and theft targets
Dimir gives premium interaction, counterspells, and evasion
Combat-damage-dependent payoff is fragile to blockers and removal
Three-color theft ability is mana-intensive to chain
Graveyard hate shuts off the theft engine entirely
Relies on connecting, so flying/menace enablers are mandatory or he stalls