Izzet Leyline Aggro floods the board with cheap creatures and pump spells like Ancestral Anger and Wild Ride, so we want cheap, efficient blockers and removal rather than slow discard. Qarsi Revenant's flying deathtouch lifelink is excellent at both blocking and racing their aggressive creatures, while Stab cleanly answers their small early threats like Elusive Otter or Stadium Headliner. The End exiles a key recursive or evasive threat and strips backup copies, denying their aggressive curve. Keep Deadly Cover-Up as a crucial sweeper against their wide boards.