Well i'm a bit worried of it.
They said it's based on Colisseum event but in this one cards won't be boosted by the E gacha. Instead the boost will affect the shards you recieve.
They also said that you will buy prizes with the shards.
If they do the current multiplier again... will mean that a full e gacha slayer guy will buy 40 + x times more than a f2p ?
If this is the case then the balance we had till now will totaly be broken in this event.