Discarding a light and a dark indicates that they might have a chaos monster
Of course we will get this exact same rule over here too at some point, but there is currently no official word from Play
C Common Junk Warrior X DARK Level 5 [ WarriorSynchroEffect ] ATK 2300 DEF 1300 "Junk Synchron" + 1+ non-Tuner monsters If this card is Synchro Summoned: It gains ATK equal to the total ATK of all Level 2 or lower monsters you currently control
Responses to this issue are varied, ranging from confusion to annoyance to anger
Its also a weak 1-drop, so this card, like Sakura-Tribe Elder before it, was made to be sacrificed anyway
Equipping Magnum Shield with Chaos-End Master will make him a useful attacker, but if he's not in Attack Position, his ATK won't rise, so he'll be treated as vanilla with no effect