Collector Boosters contain cards from the main set, as well as most supplemental products associated with a set
While putting the same trigger on a 5-drop rather than a 3-drop is bound to make it weaker, drawing a card is still one of the best possible payoffs for doing something and you dont even need to build around G'raha Tia to make it good
4 Goblin War Strike Goblin War Strike is a powerful sorcery card that acts like Goblin Bombardment without the sacrifice for one turn
Honestly there's not much bad I have to say about Spellweaver Volute
There are 13 card types, though, in most formats, a player only has to concern themselves with seven
The adventure adds something, though not enough to justify spending more mana for the primary effect, which is clunky even at four mana