Agreed with the above, advantage just means roll two dice and use the higher number, that means if they are doing a spell save roll against your magic they have a better chance of avoiding it maybe, but they don't take half damage off the bat like with resistances as that's different.

If you tried to hit some one with a fireball for example they might have to do a dexterity roll to avoid it, they could do that roll with advantage which gives them a better chance.
If they fail however and take damage from it you THEN look at if they are resistant to magic or specifically fire magic and if they are then can take reduced damage, however the advantage doesn't cause changes in damage itself.

Agreed with Korvins answer, advantage just means roll two dice and use the higher number, that means if they are doing a spell save roll against your magic they have a better chance of avoiding it maybe, but they don't take half damage off the bat like with resistances as that's different.

If you tried to hit some one with a fireball for example they might have to do a dexterity roll to avoid it, they could do that roll with advantage which gives them a better chance.
If they fail however and take damage from it you THEN look at if they are resistant to magic or specifically fire magic and if they are then can take reduced damage, however the advantage doesn't cause changes in damage itself.

Agreed with the above, advantage just means roll two dice and use the higher number, that means if they are doing a spell save roll against your magic they have a better chance of avoiding it maybe, but they dont take half damage off the bat like with resistances as that's different.

If you tried to hit some one with a fireball for example they might have to do a dexterity roll to avoid it, they could do that roll with advantage which gives them a better chance. If they fail however and take damage from it you THEN look at if they are resistant to magic or specifically fire magic and if they are then can take reduced damage, however the advantage dosnt cause changes in damage itself

Agreed with the above, advantage just means roll two dice and use the higher number, that means if they are doing a spell save roll against your magic they have a better chance of avoiding it maybe, but they don't take half damage off the bat like with resistances as that's different.

If you tried to hit some one with a fireball for example they might have to do a dexterity roll to avoid it, they could do that roll with advantage which gives them a better chance. 
If they fail however and take damage from it you THEN look at if they are resistant to magic or specifically fire magic and if they are then can take reduced damage, however the advantage doesn't cause changes in damage itself.