Your guide to all the wild new Warhammer 40k core stratagems and reserves rules for 10th Edition, from the core rulebook, explained!. Unless otherwise noted, you can use the same Stratagem multiple times during the course of a battle, (for the purposes of this rule, Stratagems that have identical names, but that appear in different publications, are still considered to be the same Stratagem).

Warhammer 40k Imperial Knights army guide
Warhammer 40k Imperial Knights army guide
Impulsor memes. Best Collection of funny Impulsor pictures on iFunny
Impulsor memes. Best Collection of funny Impulsor pictures on iFunny
Can you do overwatch twice per turn with a free
Can you do overwatch twice per turn with a free
So is it possible for me to use this stratagem
So is it possible for me to use this stratagem
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Start Competing Iron Hands Tactics Goonhammer
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40K Redemptor Dreadnought and Ultramarines In Action Bell of Lost
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Warhammer 40K Pariah Inquisition Rules Preview Bell of Lost Souls
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Warhammer 40K Space Marine Stratagems Everyone Needs Bell of Lost
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Battlesuits, including Farsight, can use the Tank Shock stratagem r
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Are You Using this Powerful 40K Stratagem? YouTube
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40k Rules & Ruling Queries Can an eligible unit use
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Warhammer 40K New Necron Stratagems & A New Look Bell
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Warhammer 40K All Stratagems Should Be One Use Only Bell
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Warhammer 40k Rules Explained (10th Edition Core Rules)
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40K Top 5 Stratagems For Astra Militarum Bell of Lost
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Warhammer 40K The App Now Has An Army List Builder
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Every Core Stratagem in Warhammer 40K Explained + How to
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Warhammer 40K We Need A Generic CounterStratagem For All Bell
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How Army Building Works in the New Edition of Warhammer
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10th Ed Warhammer 40K Guide 13 Stratagems Command Reroll and
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40k Core Stratagems and Reserves Rules Explained
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Warhammer 40K Playing Ravenwing in 9th Edition Stratagem Tactics
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Warlord Wednesdays Legion Focus Legio Osedax Goonhammer

If it says it's free and does specify the name of the stratagem. It means you reduce the cost by 1 and can double up on its use for that specific stratagem. An example of this is a necrons hexmark destroyer with overwatch. Both reduce the cost of the stratagem, but you can only double up if the stratagem is specifically mentioned in the ability.. Here's the question! Can the Hive Tyrant's ability "Will of the Hive Mind" be used to use the "Fire overwatch" stratagem twice in a phase? Will of the Hive Mind reads: "Once per turn, one friendly Tyranids unit within 12" of one or more models with this ability can be targeted with a Stratagem for 0CP, even if another unit from your army has already been targeted with that.