When a Attack or Special Attack scores more stars on the roll than the defender, a Wound counter is placed on the target. Abilities with Massive Damage place two counters instead of one.
When wounds are placed,
SD:E 1.0
Advance the Power Gauge and if the Heros are responsible the Loot-O-Meter.
It is also possible for conditions like Fire or abilities like Backlash to place wound counters on models, in most cases the Power Gauge does not advance.
SD:E 2.0
For each wound the Hero inflicts. Add +1 Wrath token