So it means his crossbow is Invincible while he's grabbing it? How am I supposed to do something then... mmhhh... let's try the following idea...

Torta Ahogada 4th Turn

Move: To L13
Standard: Ready an Action

Spoiler
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To attack Hustler when he has two hand grip on crossbow



End of Turn

STATS
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Torta started @ J13
Torta ended @ L13
HP 13/14
AC 16 (10 +2 dex, +3 armor, +1 shield) Touch 12 FF 14

99 Large Sling bullets left
(ALL carried mwahahaha)

Hand 1 Wielding: Sling
Hand 2 Wielding: Nothing

No consumables used yet