Stormcaller's Boon

Cascade on a four-mana enchantment is the whole reason this card is interesting, and it is also why it almost never gets cast for what it does. The printed text is a one-shot evasion grant: sacrifice it, your team flies, you stole a turn through a ground stall. A fine effect, and a forgettable one. The cascade trigger reframes the card as a delivery vehicle. Casting it digs until it hits the first nonland under four mana and casts that for free, which means the white-blue enchantment is partly a wrapper around whatever your three-drops and below happen to be. The friction is that you do not choose the spell you find: cascade resolves the first legal hit, so the value of the trigger is only as disciplined as the curve you built underneath it. That makes the enchantment's own ability close to incidental in any deck built to abuse the keyword; you are paying four mana for a free spell and getting a flying-grant attached as a consolation. It belongs to the brief era when cascade was stapled to ordinary multicolor commons and uncommons rather than reserved for marquee rares, an experiment in attaching a free-cast engine to effects modest enough that the bonus, not the printed text, was the point.