Day-one buyers finish playsets of staples first
In original MtG, PW mechanics usually revolve around casting Ability 1 repeatedly, then choosing to either cast Ability 2 for medium effect or Ability 3 for Win
Whelming Wave was the design team being as unsubtle as possible
When soaking the to-be-peeled card for long periods in water the adhesive eventually dissolves, the paper backing soaks up water and breaks away as it expands
In addition, most of the spells in this set that trigger them tend to be great, including winners like: Thunder Magic Ice Magic Dreams of Laguna (triggers with flashback) Retrieve the Esper Eject Sorceress's Schemes Choco-Comet UR gets to play a ton of good interaction and card advantage, all of which can set up cascading advantages with its value creatures
Making Cavern of Souls your source of creature spell mana protects you, as when they are cast using this mana, it also blocks them from being countered