Ilharg, the Raze-Boar

The attack trigger is a body-mounted variation on a very old red trick: cheat a fat creature into play, ride its entering-the-battlefield value, then hand it back before you pay full price. Where Sneak Attack rents the creature at instant speed and sacrifices it at the end step (a one-shot that leaves nothing behind if the enabler is answered), this folds the operation into a recurring engine that keeps swinging turn after turn. The smuggled creature arrives tapped and attacking, so it skips the tap-and-declare step entirely, and any enters-the-battlefield ability it carries goes on the stack before blockers, meaning the opponent has to react to that trigger while already staring down two attackers. Note that the borrowed creature does not get its own attack triggers, since it was placed into combat rather than declared as an attacker; the payoff is the body, the ETB, and the surprise blocker math. The death-or-exile clause is the god-cycle insurance running through this batch of legendary creatures: kill it and it slides back into the library near the top rather than sitting in the graveyard, turning removal into a delay instead of an answer. As a 6/6 trampler for five, it is already a serviceable clock; the trigger converts every swing into a question about which giant in your hand you would most like to borrow for a turn.