It taps to deal 2 damage to a random target or player
It's important to recognise that a lot of these cards only have value when applied well - for example, Dialga works because it supplies energy to other existing cards, but if they can't make use of that Steel type energy, then they're going to be useless to you
The decks Leader effect is primarily intended to blunt the opponents aggression by reducing an opposing Leader or Character cards Power by 1000 during that turn
Cards like Shiny Charizard from the Hidden Fates series have become true collectors items, with prices reaching into the thousands of dollars
Yes, Rogue's Passage is a card that goes into many of these types of decks, but has cards like Aether Tunnel, Aqueous Form, Artful Dodge, and cards like that
Once the Battle card has been defeated meaning that all of its defense counters have been removed the card is exiled and the reverse side is cast