Zareth San, the Trickster

The activated ability is where the design lives, and it works entirely inside the sliver of time after blocks are declared. Instead of hard-casting the 4/4, you swap it in: return an already-unblocked Rogue you control to hand, and this arrives tapped and attacking in that slot, no summoning sickness and no combat math left for the defender to redo. A small, ignored attacker becomes a fresh threat the opponent has already missed their window to block, and damage lands after they thought the step was settled. That connection is the payload: hit a player and you pull any permanent card, not just a creature, from that player's graveyard onto the battlefield under your control, so lands, artifacts, planeswalkers, and enchantments are all in range. The engine wants a spread of evasive Rogues to launder into damage, and because the trigger keys off the specific player who took the hit, the design rewards distributing pressure across attackers rather than dumping everything onto one body. Flash is the secondary line, and a distinct one: it lets you deploy the body at instant speed on a defensive turn, ambushing an attacker rather than orchestrating the combat swap. Two separate play patterns share the card, but the theft trigger is the reason to build around it. It is a graveyard-plundering threat wearing the costume of a tempo creature: it does not exile what an opponent buried, it steals the card and drops it into play on your side.