If you're counting on Winged Sliver or Muscle Sliver or any other boost to carry you through combat, then a removal spell on the key ability can destroy your entire team, and even with Hibernation Sliver available such a blow is often crippling
(Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.) A tempest is coming
Ultimately, though, like every Lorcana mechanic I was introduced to in these two Rise of the Floodborn starter decks, it only took a few games before it became much easier to understand, and the flow of the game was natural
Chart a course through Sothera and explore distant planets, wield dazzling magic, and wage war with alien factions
While they saw several revisions over the years, fat packs managed to stick around for almost 20 years
Im sure there was some other good stuff in there from a gameplay standpoint, I just have no clue what is what