Parasite and armor piercing

[wizuriel]

Lylyth spells Parasite lowers a target armor by 3 and armor piercing against a large based models halves the armor.

Do you apply the parasite first and armor pierce on the new value or other way around?

Suppose Jack A has 20ARM normally. parasite brings it to 17 and armor piercing brings it to 9?

Or would it be Jack A has 20ARM. armor piercing brings it to 10 and parasite brings it to 7?

[Necra-Chi]

Modifiers after halving.

Half ARM then -3.

[rydiafan]

This is true of bonuses and Focus camping as well.

You always do all multiplication/division first, then do all addition/subtraction.

[Askew37]

Note that in Armor Piercing, it is always against the BASE armor value. This is before modifying the armor score positive or negative in any means. Half the base armor stat as it appears on the card, THEN apply any modifiers (Shield, Buckler, Arcane Shield, Parasite, any other spells or abilities, etc).