Friendly
From Archon Arcana - The KeyForge Wiki
If a card ability refers to a “friendly” game element, it refers to an element currently under the control of the same player.
Related Topics: Control and Ownership, Enemy
—KeyForge Master Rulebook v17.3 March 2024
Commentary
Based on the ruling for Nexus and Shard of Greed, a card that is being treated "as if it were yours" is considered to be friendly for the purposes of resolving the ability text.
Source: •Shard of Greed•