You can use Lugia EX , which gives you a powerful late game finish with its Ability, Overflow
Chaos: Whenever you roll Chaos, until a player planeswalks., whenever a creature you control dies, each opponent sacrifices a creature
None of its abilities will be active to begin with, but you can unlock any locked door by paying its mana cost as a sorcery (meaning during your main phase when there are no spells or abilities on the stack)
[spoiler='Starting Hand'] [spoiler='Orichalcos Kyutora (Monster A)'] You can Special Summon this monster from your hand by paying 500 Life Points
Magic Ruler is a modest 104 cards, a far cry from its predecessor Metal Raiders which boasted a massive 144
Maybe it's just fodder for something, or maybe some of these Spells are just red herrings