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So what are these Dominus creatures, and why are they important

You can find this in Collector Boosters

The deck has a number of dual lands and tri lands for mana fixing, as well as 4 copies of Manaweft Sliver to help you quickly cast your 4-color sliver army

Still, the set is bound to have a few duds, and some cards were pretty disappointing, considering the characters and LotR story moments that they represent

This kind of arms race results in decks just trying to go faster, as playing stax or control is frowned upon by the average player as boring

On the other, the continued exclusivity of promotions like this is starting to grate a little