
Some extra details for □□□ Impulse Control : If you start the game with 2x Honed Instinct at first, when you spend 3 XP to check the boxes, the 3rd copy can come in and replace any card in the deck for free, with the special customizable rule that came with the Investigator Expansion box (see below).
This rule also allow not including any Honed Instinct at first, then spend 3 XP (or more, like one of the □ customization) to swap in all 3x Honed Instinct with the customization into the deck at once. (e.g. If you think 3 cards deck space should be for something better than a base Honed Instinct.)
An investigator may directly purchase one or more copies of a new customizable card with one or more upgrades by spending only the amount of experience points required to purchase those upgrades. (Doing so counts as purchasing a new card, not upgrading an existing card.)