by Asipu
Jesse's first active ability has a target, which means the target will be affected, not him. This means the attack and the "reduce range by 1 this round" (Active abilities, page 23). This can come in handy against some ranged monsters later in the game.Same applies to Artemis and his "reduce attack rolls by 1", which means he will weaken the attack of the monsters he is attacking.
As a final note, the (max 1) means that the lasting effect can't be stacked (Lasting effect, page 26) and it will last until the start of the next Explorer phase.
Remember, most active abilities require a legal target (as is the case with the default attack abilities of Core explorers) that the ability
will affect (Active ability, page 23).
Focus on the Music box artifact and understand how two of its abilities work (if you understand this item you understand the ability framework of the game):
The first ability affects the target, but the second affects the owner of this item.
(An active ability that doesn’t require a legal target affects the activating unit by default)