G'raha Tia [Journey of Discovery]

When G'raha Tia enters the field from your hand, reveal the top 5 cards of your deck. Return them to the bottom of your deck in any order. If there were 3 or more different Elements among the revealed cards, draw 2 cards. If there were 5 or more, also during this turn, the cost required to cast your next card is reduced by 4. If there were 8 or more, also remove all the Characters opponent controls and all cards in your opponent's Break Zone from the game.