At the start of a match you will be dealt five cardds from your deck to your hand, and one more at the beginning of each turn. You will not be able to see what cards your opponent has in his hand. Monsters must be summoned before they can attack. To do this, drag the monster area. You may only begin to summon one monster each turn. Monsters cannot attack while being summoned. However, they can still be targetted by enemy attacks, or have magic cards used on them. Powerful monsters can take more than one turn to summon, while weak monsters such as rats have no summoning time at all.