Tap enchanted creature: Untap target artifact, creature, or land
There are two other important factors at play here
Each Collector Booster contains a foil metropolis land, which could be any of the triomes or common lands like Waterfront District
The former could hit cards like Birthing Pod, Cryptic Command and Splinter Twin all of which were important, but the latter was better versus Burn and Zoo, and also back then manabases were a lot more painful as decks were more reliant on Shocklands, which meant a turn one Thoughtseize commonly saw you at 15 life from the get-go
The big green finisher to end all finishers
This can clear the board or just burn your opponent out of the game, whichevers more convenient