Quadracorder
From Archon Arcana - The KeyForge Wiki
Quadracorder • Star Alliance • Upgrade • Uncommon • Your opponent’s keys cost +1for each house represented among friendly creatures (to a maximum of 3). • Artist: Natalie Russo • Card Number: WC:316
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Your opponent’s keys cost +1 for each house represented among friendly creatures (to a maximum of 3).
for each house represented among friendly creatures (to a maximum of 3). “It scans as ‘mostly harmless.’”
WC 316
Artist: Natalie Russo
Commentary
Upgrades enter play under the control of the player who played the upgrade. For Quadracorder, this means that it doesn't matter if it is attached to a Friendly or Enemy creature, the "You/Your" in the constant ability text refers to the person who played the card, regardless of which player controls the creature to which the upgrade is attached.
Source: FFG Worlds Collide Gameplay video