"...the effects a character gains while in a set-aside area remain with the character when he returns to the Field of Play until the character is removed from the game, returned to hand, or placed in a draw or discard pile. Moreover, the gained effect cannot be interrupted, prevented or negated." -
REGIs the drawing from Pentecost a gained ability of the heroes or just part of the enhancement ability?
Broken Cisterns - "Place in an opponent's territory. Negate draw abilities used by that player. All Heroes in that territory are decreased by 0/X."
Pentecost - "Set aside all of your human Heroes for one turn. On return, you may draw three cards."