yugioh structure deck saga of blue-eyes white dragon Yu-Gi-Oh! Watch your foes cower as you take it to the next level and Synchro Summon Azure Yugioh TCG: Saga of Blue

Link Summon "Cyber Dragon Sieger" using "Clockwork Knight" and "Core" Summon "Wurm" from Graveyard, adding back "Realm", and also sending "Cyber Dragon Herz" to Graveyard to add "Cyber Dragon" to hand

EFFECT Choose up to 3 monsters on your field

That alone is pretty powerful, but I would say it is even more relevant for the fighting types than others, as they typically require a ton of energy in order to execute their attacks

This is the Bant Eldrazi deck he used to take home the trophy, fueled by Ancient Stirrings: Creatures (25) 4 Noble Hierarch 1 Spellskite 3 Drowner of Hope 2 Eldrazi Skyspawner 4 Eldrazi Displacer 4 Reality Smasher 4 Thought-Knot Seer 3 Matter Reshaper Lands (24) Spells (11) With a maindeck featuring just Ancient Stirrings, Path to Exile, Dismember, and Noble Hierarch for non-hits, three-quarters of BBDs deck could be found by Ancient Stirrings, smoothing out draws by finding lands when needed (especially Eldrazi Temple) or threats when he didnt