Zur, Eternal Schemer is certainly no Zur the Enchanter, but it brings a fresh look while maintain the original aspect of the card
Granted they enter tapped, but if you can station them sufficiently, these two lands do a decent imitation of Gaea's Cradle and Tolarian Academy, two busted lands from Urza's Saga
Thassas Oracle Thassa's Oracle, or Thoracle, is one of the main win conditions in cEDH, and it saw heavy play in Pioneer before the banning of Inverter of Truth
These symbols also have colors to further assist
Fulminator Mage Fulminator Mage has seen some Modern/Legacy play as targeted hate against good nonbasic lands
The easiest way to think of it is this: if you know you always want to see at least one copy of a particular creature or spell (or anything else) each game, then you want four of it