Chorus of the Tides

Heroic asks a deck to spend cards on its own creature, and this Siren softens that bargain better than most of its cycle-mates. The scry trigger does not pump the body or threaten the board; it digs. Every aura, pump spell, or combat trick you point at it pays a small dividend toward your next draw, which means the targeting cost that heroic always carries gets partly refunded in card selection rather than tempo. That changes who wants it. A pure beatdown shell wants its heroic creature to grow when targeted; a control or tempo build wants to smooth its draws while it slowly assembles an evasive clock. A flying body that filters as it accumulates spells fits the latter, where the spells you cast on it are doing double duty as protection and as a reason to keep digging toward the ones that matter. The 3/2 frame keeps it honest: this is a threat you have to defend, not one that defends itself, so the scry is partial compensation for a creature that folds to most removal the moment it lands. Heroic was always a mechanic that rewarded a critical mass of cheap targeted spells, and the designs that gave you something useful even when the pump was overkill have aged best.