Pull one, get one free. Raid Shadow Legends players have the chance to get two for the price of one when obtaining Legendary Champions from Sacred shards. There is no increase to the chance of getting a Legendary Champion from a shard, and no guarantee that you will get one, so consider this if you decide to pull during this event.
Honestly, we think you shouldn’t. There is still only a 6% chance of pulling a Champion from a Sacred shard, and you are better saving up 15+ shards for the next guaranteed summon, or for the next fragment/fusion event.