When this upgrade becomes attached to a non-leader unit that costs 3 or less: Take control of that unit.
When this upgrade becomes unattached from a unit: That unit's owner takes control of it.

When this upgrade becomes attached to a non‑leader unit that costs 3 or less: Take control of that unit.

When this upgrade becomes unattached from a unit: That unit’s owner takes control of it.

Rules Clarifications:

• Abilities that refer to a card’s cost always refer to its printed cost, regardless of modifiers.