yugioh booster box lob Yu-Gi-Oh! TCG: Blue Eyes White Dragon : Toys & Games Yu-GI-Oh! - Sealed LOB Booster

The selling point of an effect like this is definitely the ceiling, and here the ceiling is a pre-combat trump card which produces lethal from far beyond the range your opponent expects for 1B

The booster packs provide excitement

Many legendary cards have higher costs to compensate for their stronger abilities, so Kethis giving you a flat one generic mana less cost for them helps get you in the game faster

But even the densest piece of jurisprudence can have addenda

With the archetypes reliance on just two Main Deck monsters that will be turned into Link monsters to keep your Main Monster Zones clear, the condition that requires you control no monsters in your Main Zones is nearly irrelevant, making this a powerful combo-starter that improves the decks consistency even in its Limited state