This is because at the end of each end step , you draw a card for each opponent who drew more than one card that turn
Your entire team gets one counter, then two, then four
Dark Contract Dark Scorpion Dark World Darklord Demonsmith Deskbot Despian, Branded Destiny HERO Diavel Diavel Star, Treasure tentative Dinomist Dinomorphia Djinn Dododo Dogmatika d dominus D Doodle Beast , Doodlebook d dooms D Dracoslayer Dracoverlord Dragon Ruler d dragon tail D Dragonmaid Dragunity Dream Mirror Drytron Dual Dual Avatar Duston E Earthbound Earthbound Immortal Elder Entity, Old Entity, Outer Entity Electromagnet Warrior Elemental HERO Elemental Lord Elementsaber Empowered Warrior Endymion e ennea craft E Evil HERO Evilswarm, Steelswarm EvilTwins Evolsaur, Evocator, Evoltile, Evolzar Evolution Pill Exosister F F.A
"Rank-Up-Magic of the Destruction Sword" Spell - Quick-Play Target 1 face-up "Buster Blader" Xyz monster you control
With powerful doubling, that is a nasty amount of card advantage