Trip the Light Fantastic (Blue)

You can only activate this ability if it’s in your hand. You can’t discard this to pay the cost if it’s not in your hand.

Discarding this card to its ability counts as activating an instant ability, not as playing an instant.

This is a shielding-prevention effect that prevents the next 2 damage in total that would be dealt to your hero. This can be over separate events of damage (i.e. 1 damage, then 1 damage).