Poison is a highly contentious mechanic in its own right, loathed by many for how suddenly it can kill and how hard it is to counteract
Crobats are used, too Crobat V DAA 104 is the cheaper option, at $18.62, that lets you draw until you have six cards in your hand the turn you put it on the bench, with a 70-damage attack that poisons the opposing monster
Getting to earthbend twice looks like a fun way of turning your trinkets into either an army or recursive blockers
Upgrading the Mana Base There are some easy (if expensive) and obvious upgrades to the mana base, should you want to play the deck at a more competitive level
As such, it is no surprise that Kaiba was able to acquire one of the most broken Spells ever created, one so powerful it had to be completely rewritten when brought to the TCG
However, locations at least can be found that correlate to each description