Siccome non mi sembra il caso di riempire altri post con OT sul marchio, mi pareva utile aprirne uno tutto per lui.
Allora, cito dal D&D Compendium.
COMBAT CHALLENGE
In combat, it’s dangerous to ignore a fighter. Every time you attack an enemy, whether the attack hits or misses, you can choose to mark that target. The mark lasts until the end of your next turn. While a target is marked, it takes a –2 penalty to attack rolls if its attack doesn’t include you as a target. A creature can be subject to only one mark at a time. A new mark supersedes a mark that was already in place.
In addition, whenever an enemy marked by you is adjacent to you and shifts or makes an attack that does not include you, you can make a melee basic attack against that enemy as an immediate interrupt.
& per il paladino
Divine Challenge
You boldly confront a nearby enemy, searing it with divine light if it ignores your challenge.
At-Will Divine, Radiant
Minor Action Close burst 5
Target: One creature in burst
Effect: You mark the target. The target remains marked until you use this power against another target, or if you fail to engage the target (see below). A creature can be subject to only one mark at a time. A new mark supersedes a mark that was already in place.
While a target is marked, it takes a –2 penalty to attack rolls for any attack that doesn't include you as a target. Also, it takes radiant damage equal to 3 + your Charisma modifier the first time it makes an attack that doesn’t include you as a target before the start of your next turn. The damage increases to 6 + your Charisma modifier at 11th level, and to 9 + your Charisma modifier at 21st level.
On your turn, you must engage the target you challenged or challenge a different target. To engage the target, you must either attack it or end your turn adjacent to it. If none of these events occur by the end of your turn, the marked condition ends and you can’t use divine challenge on your next turn.
You can use divine challenge once per turn.
Special: Even though this ability is called a challenge, it doesn’t rely on the intelligence or language ability of the target. It’s a magical compulsion that affects the creature’s behavior, regardless of the creature’s nature. You can’t place a divine challenge on a creature that is already affected by your or another character’s divine challenge.
First published in Player's Handbook.
Come si envince chiaramente, il paladino non marchia, il paladino usa un POTERE che marchia e che fa altre cose. Siccome il Bardo non dice "il paladino usa la sua sfida divina" ma "marchia un avversario entro 5" tutti gli effetti della sfida non si applicano neanche per volere divino. Il marchio è il -2 punto.
Il guerriero invece fa sempre COSE sul bersaglio marchiato proprio perchè non deve utilizzare un potere, allora si che questo funziona con il Bardo.
Spero di aver spiegato bene le mie ragioni...