Double strike, haste
Whenever this creature attacks, you get EE (two energy counters), then you may pay eight E. If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.
Combat Celebrantfinisher$0.70Like Lightning Runner, it creates extra combat phases from a single aggressive attack trigger. It is a red creature finisher that can snowball combat steps quickly.
Aurelia, the Warleaderfinisher$18.88A classic extra-combat creature that rewards attacking and can immediately snowball into lethal damage. It fills the same combat-advantage finisher role, though in Boros instead of mono-red.
Karlach, Fury of Avernusfinisher$22.61This creature grants an additional combat phase when it attacks, closely mirroring Lightning Runner’s combat-chain payoff. It is also a haste-based aggressive finisher.
Laelia, the Blade Reforgedfinisher$1.66A red combat-focused threat that grows while attacking and rewards repeated aggression. It is not an extra-combat engine by itself, but it serves a similar proactive red finisher role.
Glint-Horn Buccaneerfinisher$6.56A hasty red creature that turns combat pressure into damage and can finish games quickly. While it lacks extra combats, it fills the same aggressive red threat slot.
Hellriderfinisher$2.98This creature rewards attacking with immediate damage to the opponent, acting as a combat-based finisher. It complements go-wide or repeated-combat strategies in the same color.
Port Razerfinisher$0.92A red attacker that can create additional combat steps when it connects, very close in battlefield function to Lightning Runner. It is another mono-red extra-combat creature finisher.
Scourge of the Thronefinisher$0.86This dragon can grant an additional combat phase on attack, making it a high-end combat-snowball finisher. It is one of the strongest analogs if you want a bigger, evasive version of the effect.