Ob Nixilis, the Hate-Twisted fits this list better but should be treated more like a 5-mana removal spell with upside, or a more costly Underworld Dreams that is a different type of permanent
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
Balamb Garden, SeeD Academy / Balamb Garden, Airborne Balamb Garden, SeeD Academy puts an interesting spin on creature lands, as it only requires a mana investment once before it becomes Balamb Garden, Airborne at the cost of losing the land
Might want to just return-to-sender that thing right away