Torque Tuned (Red)

If an item you control has been destroyed this turn, this gets overpower.

Galvanize - When this defends, you may destroy an item you control. If you do, this gets +2

Rulings

From the Bright Lights + Round the Table release notes

If this is already defended by two or more action cards, and then an item you control is destroyed, this gains overpower but the defending action cards are not retroactively removed.
This triggers when this becomes a defending card on the combat chain. When the triggered effect resolves, you choose whether to destroy an item you control.

Keyword notes

Overpower - The defending hero can’t defend this with more than one action card.

Overpower is a static ability that generates a continuous effect.
A player can not declare more than one defending action card against an attack with overpower.
Overpower does not prevent additional action cards being added as defending cards through effects (e.g. Amulet of Havencall).

All keywords

Galvanize - Galvanize – When this defends, you may destroy an item you control. If you do, […]