Skipper

Description
On hit, lower the target's by 5 for 20 seconds.

Strategy and Synergy
The only spell in the game capable of decreasing the Defense of the target, which is pretty useful against bosses, since even at their first tier all of them have a minimum of 2 defense.

It may be difficult to get used to Skipper at first, but with former experience with spells which targets the fourth tile (i.e: ) aiming it becomes more manageable. Just keep in mind that Skipper won't target the tile right in front of you, but rather the adjacent one, and will hit every two tiles ahead. The skipping projectile has an average speed, so enemies standing far behind may dodge it if cast at the first column.

Without factoring the defense-reduction ability, Skipper deals 120 damage for 2 mana, not as mana-efficient than other spells, but the player may wish to keep it in the deck due to its unique ability. If the mana cost becomes a hassle, one is enough to make it more flexible in low  decks/heroes. Another useful upgrade to apply is combined with  to lower the target's defense even further.