— Each kit has five 14-card boosters and a nonrandom 15-card pack built around one of Radiance’s nine Legends; players add 10 opened cards to reach the 25-card minimum. Sign-ups get Heimerdinger, Academy Instructor (RAD 132/167) while supplies last; Player2 reports it is a 6-Energy, 5-Might Champion Unit that can replace a unit token with a 3-Might Mech token. Player2 says the promo was barred from deck construction at Riot’s Sept. 29 summit, but Riot hasn’t clarified store-event legality, so ask your organizer.