Level Up ultimately rewards incremental progress, synergy stacking, and clever use of resources
4 Fusion Summoning is Home to Some of Yu-Gi-Oh!'s Most Iconic Archetypes Tearlaments and Branded Changed an Integral Mechanic For the longest time, Fusion summoning was inefficient because players had to use two specific monsters to summon one card from the extra deck, meaning that it often took too many resources for the summoning method to thrive
Ertais Familiar Ertai's Familiar is powerful because of an errata that makes it mill you when it leaves play or phases out
all monsters you currently control gain 300 ATK
Saskia the Unyielding Saskia the Unyielding is an aggressive commander thats perfect for combat-focused decks, with a big drawback: Choosing an opponent as its target paints a big bullseye on you, and youll need ways to protect yourself from retaliation
All of that is great, but back then there were answer cards like Swords to Plowshares that could render that moot and stick you with a rather annoying bill