Grand Abolisher Chief: While it doesnt stop literally everything, this card is one of the best ways to make sure that you can take your big, exciting turn without interruption
Chaos: Whenever you roll Chaos, each opponent loses 3 life and you gain X life, where X is the total amount of life lost this way
It costs one more than Thran Dynamo, yes, but it also lets you eventually get access to ludicrous amounts of extra mana, more than you could ever dream of having access to
Hiscost reduction ability means you can play most of the slivers in your deck FOR FREE
Blue cards are centered around the mental side of battle knowledge, control, manipulation, and foresight
Kitesail Freebooter This new addition has not had too much testing yet but early indications suggest it is a big winner