Opal

Opal gems are characterized by their ability to decrease cooldowns by % on all gems within their range, average range, cyan damage type and below average single-target damage. Special combinations have no overarching theme.

Opals' cooling shadows aren't perfectly horizontally symmetrical; having slight preference for topside.

Currently, decreasing cooldowns in a web game is bugged - at times, when opal is removed for a special gem, the cooldown reduction may stay on some for a turn, and when weaker opal's range overlaps stronger one it may increase the cooldowns of gems placed after stronger opal [?] that are in overlapping range.

Waves that are weak to opal gems are 2, 14 and 31. Effect area: