how can I get an attribute of +1 +2 or +3 Acheter Des PO eH

how can I get an attribute of +1 +2 or +3

When you see stuff like Domination Magic 12 + 1 + 2 wow po, the first number is the +1 attribute that you get from your piece of headgear. The second number is from the recommended equipped rune (I'm assuming you're reading build guides off of PvX wiki or somesuch). So in this case, it would be 12 points in Domination Magic, a +1 to Domination Magic headpiece, and a Major Rune of Domination Magic +2 wow gold.

You can get this by applying Runes to your piece of armor.

Only the highest quality rune you have on your armor will count for the attribute. So you can't put on 3 Minor runes and get +3 to an attribute. You need to use a Superior rune for that Acheter Des PO. The hit you take to your health stacks in the same way as the +X to attributes. If you have a Superior Rune of Domination Magic and a Superior Rune of Illusion Magic on your armor, you will have -150 health.

In addition, there are weapon upgrades you can get with a 20% chance to give you +1 in a certain attribute, as well as consumables, like Candy Corn wow gold po, Golden Eggs, Lunar Blessings, and Grails of Might. The weapon upgrades aren't used very often though, and Grails of Might are the only attribute-raising consumable you can reliably get year-round because it's craftable gw2 gold, as you can only get the others at certain times of the year during events.