holographic energy card Darkness (Unnumbered 2013) (Theme Deck Exclusive) [Unnumbered Energies] Lightly Played holofoil pattern or surface detail) Basic Lightning Energy - 012

Harmonizing Magician lets you swarm the field more efficiently as it can summon a monster from the Deck when it is Pendulum Summoned from hand, it is also a Tuner that opens up for more Synchro Combo plays

Legendary Creature - Wizard Otter See Double This spell can't be copied

Arcbound Ravager

As it does the same for the opponent, it can also be used to ruin their current strategy

SH: Thur 6pm-9pm

There are subcategories within these rarities that make things a bit more complicated, but at the most basic level you can determine rarity at a glance by looking at the symbol to the right of the collector card number