The merged creature is the same creature it was before the merge, so any Auras or counters that were on it remain on it, it remains tapped if it was tapped, it's still attacking if it was attacking, and so on
Personally, we think its great that people will have a chance to get a promo without attending events that cost thousands of dollars to attend
Where will you be able to use these cards, other than the prerelease and subsequent Jumpstart events
With Norse mythology came dwarves and and a whole lot of treasure, including the legendary dwarf berserker Magda, Brazen Outlaw - who generates a new treasure token every time she or any other dwarf is tapped, and can sacrifice five treasures at once in exchange for searching your deck for any dragon or artifact to immediately put on the battlefield
Or maybe you even think theres some sleepers in the set that will jump in price
The Shadowmoor Liege cycle I originally wanted to only mention Murkfiend Liege, but yeah, theres also nine other lieges, which are all fine cards, especially if you intend on beating down