Holy Judgment
Add 2 boost to this card.ACTIVE
Friendly commons have +1 strength.At the start of your turn, you may spend 1 boost instead of discarding this event.
Each time a friendly unit is destroyed, remove 1 boost from this card, if able.
Card Strategy
Sera's Epic Event is very powerful and versatile, ensuring you get extra strength one turn, but possibly even two turns, and aiming for that is entirely reasonable. Vanguards damage isn’t great but playing Holy Judgment changes that.
Between all of Sera's protective tools, keeping your units alive is realistic. Remember too that this card boosts your Temple Priest healing so keeping a 2 flank fight while healing really maximizes this card's value.
It still can be used to try to one-shot an enemy champion or summoner, even if it means it will only last one turn, but such will not be its most common use.