MONSTERS ARE MORE THAN ATK AND DEF ATK and DEF are a big part of deciding which monsters to use in a Deck, but they are not everything. Read all your monster effects carefully. "Opticlops" has 1800 ATK and "Cannon Soldier" only has 1400 ATK, so "Opticlops" may seem like a better choice. But "Cannon Soldier" is an Effect Monster, and its effect allows you to Tribute a monster to inflict 500 damage to your opponent's Life Points. So if you attack directly with "Opticlops" you will inflict 1800 points of damage, and if you attack directly with "Cannon Soldier" and then Tribute it to use its effect, you've inflicted a total of 1900 points of damage. Now you see that "Cannon Soldier" can do more damage in one turn than "Opticlops" can. This is something to consider when you are selecting cards for your Deck. - click here for another Dueling Tip.