This was also posted within the FAQ, but I chose to post it in the general forum as well, in order to solicit feedback from others and see how you are playing this scenario:
Chaos Beasts (Conversion Kit) have the Morph ability which reads:
"When this monster attacks, it uses the dice of a figure (overlord's choice) in its line of sight. If a hero is chosen, the overlord may choose which of the hero's equipped weapons to use. The monster cannot use any of the figure's other abilities, just the dice".
This raised several questions for us.
1) Assume that a Chaos Beast is using a hero's melee weapon (specifically the Iron BattleAxe - Act I Shop Item). The dice rolled are Blue Red. This weapon also provides a base Pierce 1, Surge: +2 Hearts, Surge: Pierce 1. Can the Chaos Beast use the base Pierce 1, and activate any surge bonuses if a surge is rolled when the Blue Red dice are rolled, or can they only count the hearts which appear on the Blue Red dice? In other words, when it states that the Chaos Beast cannot use any of the figure's other abilities, just the dice, are Pierce and utilized surges considered abilities?
2) Assume that a Chaos Beast does not have any other monsters in line of sight. Further assume that the only hero in line of sight was smart enough during his turn to not leave himself with any equipped weapon. What can the Chaos Beast use for an attack? Can the Chaos Beast basically use the default attack of a fist attack, rolling just the Blue die? Can it not attack at all?