Empyrean Rapture (DTD004) [Dusk till Dawn]

If a card with Herald in its name has been put into your hero's soul during your turn, the first hero ability you activate that turn costs [2 Resource] less to activate.
<br><strong>Once per Turn Instant</strong> — [1 Resource]: This gets <strong>ward 1</strong> until end of turn. <em>(If your hero would be dealt damage, destroy this to prevent 1 of that damage.)</em>