The Bard Talent Jack of Spells allows the bard to poach a spell from another spell casting class.
Several Wizard Spells have the descriptor "Cyclic"; these spells are usable at will so long as the Escalation Die is Even. If the spell is cast when the Escalation Die is odd, it cannot be used again until the end of combat.
Sorcerer Spells have a similar mechanic with the "Breath Weapon" descriptor; Nominally 'Daily' spells, after being used once, they can be used again within the same combat if a successful recharge roll is made.
However, a Bard using Jack of Spells doesn't have the Breath Weapon or Cyclical Spells class feature of the Sorcerer or Wizard; which leads to the question: If a Bard Jacks a 'Cylical' spell, can he reuse it so long as the Escalation Die is Even? Or must he always treat it as a once-per-battle ability? Does he get recharge rolls for a Jacked Breath Weapon? What about a Sorcerer picking up 'Cyclical' spells via Access to Wizardry? Or a Ranger with Fey Queen's Enchantments?