Tragoedia

Definitely one amazing card. It has up to 3600 ATK and DEF with no supporting cards. It is rather easy to summon because it special summons itself from your hand when you take battle damage. It can dodge stall cards like Gravity Bind and Level Limit - Area B because it can change it level, also making for easy Xyz summons. A underused effect of Tragoedia, which in my opinion is the most powerful of its effects, is the effect which states that you can discard a monster, and then take control of a monster on the field with the same level FOREVER! Take control of a Black Luster Soldier by discarding a Grapha, Dragon Lord of the Dark World to pop something on their side of the field as well. Tragoedia, a power house which is semi-limited, so you can have two in a deck makes it almost essential to many decks.

Master Hyperion

     Hailed as one of the best bosses in the game, Master Hyperion is a card which is ultra-easy to summon and whose effect lets you pop two cards of the field each turn without losing any advantage.  Being LIGHT and Fairy, Hyperion has many support cards, including Agent of Mystery - Earth which, because it is a agent can summon Hyperion, and it searches Hyperion too if a Sanctuary in the Sky is on the field. Hyperion builds are not very common because of the archetype that it supports, the Agents, which tend to be slow unless a deck is built properly. But, an easy way to build a Hyperion deck is to get 3 Lost Sanctuary structure decks which have a Hyperion and the important agents in it. Overall Hyperion is a fun card to use.