Since we don't have "golden cloud beast - Malong" yet on the Ygoprodeck deck builder, the extra deck has has 14 cards.
The new "Golden Cloud Beast - Malong" is quite an addition to Swordsoul since it might let you synchro a Level 10 while also returning one opponent card to the hand. "Bystial Dis Pater" is also good on this deck since it can bring back one of your banished light or dark monsters for your synchro summons.
Bystials are not really that good against the meta right now as they once were. Still, running some is fine since they can be used as synchro material with Ringowurm.
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