Like most Magic: The Gathering cards, the value of Maelstrom of the Spirit Dragon depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Tarkir: Dragonstorm)
For this list, Ill talk about the cards that have a major usage rate across the Modern format along with the cards that fit in multiple archetypes, but Ill exclude cards that have been banned or cards that belong to only one deck, like Colossus Hammer
THE BROTHERS' WAR PRODUCT LINEUP Prerelease Packs Fun for new and old players alike
The only choice you have is to play the deck as designed and use the strong abilities of your artifact creatures to gain an advantage, keep them in line with your spells and occasionally you can go ham with Time Sieve
The best filler you can get generally