Many people think that Priority is of the simplest part of Yu-Gi-Oh. At first learning what "prio" is, you just have the thought of:
"Ok, I'll summon Gale and I think Gale has priority so I'll call it."
Yes, this is priority since Gale's effect is an Ignition effect. But this isn't what priority is about. Priority is about the turn player being able to activate an effect before the opponent, as long as the turn player retains priority. Which is securing the turn player that his cards effect will be Chain Link 1. What does this mean? Let me tell you with some brief, in game examples.
Situation 1: Draw Phase
You have 3 cards in your hand and it is your turn. During your draw phase, you draw a card and it happens to by Mystical Space Typhoon. If you suspect your opponent's face-down trap card is a Trap Dustshoot, you can "retain priority" in the Draw Phase and activate Mystical Space Typhoon before your opponent can activate Trap Dustshoot.
That was an example of priority outside of the Main Phases. Now let me give you an example of Priority during the damage step.
Situation 2: Damage Step
Lets say your monster is Jain, Lightsworn Paladin, and your opponents monster is Cyber Dragon. It is your turn in your battle phase. You declare an attack with Jain, and ask if your opponent has a response to the attack, which would be the time that your opponent would activate a card like Dimensional Prison or Mirror Force, etc. If your opponent says "No." then you can retain your priority as the turn player and drop Honest from your hand. Now your opponent can also drop Honest, but guess who wins the battle? Jain! Why so? Well it gets deeper with Chain Links so let me explain.
Whenever you call priority it is ensured that your cards effect will have its spot on Chain Link 1. And as we already know Chain Links resolve backwards, so:
Chain Link 1 - Your Honest
Chain Link 2 - Your opponents Honest
-Chain Resolves Backwards-
Chain Link 2 Resolves - Your opponents Cyber Dragon's attack is 4200. Since he gains the attack points of Jain (+300 from Jain's effect)
Chain Link 1 Resolves - Your Jain's original attack is 2100 in this situation, but you add the new attack of Cyber Dragon, making your Jain gain 4200 attack points! With the new total of 6300.
Again, this is also outdated. Wrote this 1 year ago and I just feel like posting it here now for the benefit of the members of DA. Enjoy!
"Ok, I'll summon Gale and I think Gale has priority so I'll call it."
Yes, this is priority since Gale's effect is an Ignition effect. But this isn't what priority is about. Priority is about the turn player being able to activate an effect before the opponent, as long as the turn player retains priority. Which is securing the turn player that his cards effect will be Chain Link 1. What does this mean? Let me tell you with some brief, in game examples.
Situation 1: Draw Phase
You have 3 cards in your hand and it is your turn. During your draw phase, you draw a card and it happens to by Mystical Space Typhoon. If you suspect your opponent's face-down trap card is a Trap Dustshoot, you can "retain priority" in the Draw Phase and activate Mystical Space Typhoon before your opponent can activate Trap Dustshoot.
That was an example of priority outside of the Main Phases. Now let me give you an example of Priority during the damage step.
Situation 2: Damage Step
Lets say your monster is Jain, Lightsworn Paladin, and your opponents monster is Cyber Dragon. It is your turn in your battle phase. You declare an attack with Jain, and ask if your opponent has a response to the attack, which would be the time that your opponent would activate a card like Dimensional Prison or Mirror Force, etc. If your opponent says "No." then you can retain your priority as the turn player and drop Honest from your hand. Now your opponent can also drop Honest, but guess who wins the battle? Jain! Why so? Well it gets deeper with Chain Links so let me explain.
Whenever you call priority it is ensured that your cards effect will have its spot on Chain Link 1. And as we already know Chain Links resolve backwards, so:
Chain Link 1 - Your Honest
Chain Link 2 - Your opponents Honest
-Chain Resolves Backwards-
Chain Link 2 Resolves - Your opponents Cyber Dragon's attack is 4200. Since he gains the attack points of Jain (+300 from Jain's effect)
Chain Link 1 Resolves - Your Jain's original attack is 2100 in this situation, but you add the new attack of Cyber Dragon, making your Jain gain 4200 attack points! With the new total of 6300.
Again, this is also outdated. Wrote this 1 year ago and I just feel like posting it here now for the benefit of the members of DA. Enjoy!