Take good pictures of your cards before sleeving them
Mega Evolution Cards (M-EX) Mega Pokmon like M Charizard EX and M Rayquaza EX delivered extreme power at the cost of ending your turn after Mega Evolving
Ojamas are actually a really fun deck to play when played properly so if you can look past what might be the ugliest monsters ever created, then Id highly recommend giving them a shot
For example, thanks to Aria's effect, it caused Melodious cards like Canon, Tamtam, and Fortissimo to become unplayable
This 5/5 stops opponents from gaining life, has Menace, and turns the mana cost of every first spell of a players turn into damage against another player
B-Tier B-Tier decks can beat anything on the Tier List, but they all have clear weaknesses