I have noticed that Dark Athel has a skill which attacks all enemies (Harvest of Despair)

The skill includes a buff, a benefit & another benefit

It is very unlikely that any of these will ever activate as there are only 5 champions allowed in any battle & eespecially in the arena where only 4 are required they all have no use

The Increase SPD buff requires that 4 enemies are killed by using it, an unlikely event & if it happens in arena then of no use

The benefit of 50% HP requires 6 enemies to be killed when maximum enemies is 5

The extra benefit of extra turn requires 10 enemies to be killed again maximum of 5 enemies in battles

I feel this needs to bae re-assessed & would suggest that 1, 2 & 3 enemies are used in place of the 4, 6 & 10 but even then it is not normal to kill more than maybe 2 enemies in any single attack although I have known it to happen on low-level campaign battles using high level champions