Id highly recommend cards with cipher, such as Writ of Return or Stolen Identity, to grow your Sliver army, and if you have the extra budget, you should add card draw enhancers, such as Teferis Ageless Insight or Alhammarrets Archive, so Raffines ability becomes actual card draw
Seems perfect for decks with a cheap, multicolored commander
At least it gives you blockers for your Lord Windgrace
Interrupted Kaiju Slumber made the Kaijus even more of a powerhouse going second
Enchantment Lotus Bloom Suspend 3 (Rather than cast this card from your hand, pay and exile it with three time counters on it
A deeper level of this Skill is that the opponent doesnt get to look at the cards you rearrange, this means you can glean information about what the opponent doesnt have in their hand to make better decisions