Unit has an Ion Shield level of 4+, which is unchanged by weapon strength or Banner size. It has a Construct Shield level of 1 times the starting number of Stalkers in the Banner. Each time a Save roll is failed, decrease the Construct Shield by 1 - you still make Armour rolls for these Hits. When a Construct Shield level is 0 or less, the Banner cannot make Ion Shield saves for the remainder of the battle.
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