The game offers now “Power in Numbers” pack for 1750 runes. Odds written are about 13% for premium dragons and 30% for a unique one (deathlout) and exclusive dragons Warywing and Dewdrop 30% each.
I used my runes to buy four of this pack in hope to get one of the premium ones (I already have the unique deathlout). All four came out with Warywing. Statistically speaking - less than 1% chance that this could happen. Very disappointing.
Don’t be tempted by this offer unless you want Warywing.