If two world permanents enter the battlefield at the same time, theyre both put into their owners graveyards. Its a type of card common to several different card games, and for good reason its a cool, evocative, and easy-to-understand way to represent battling in a specific place. Representing dungeons as world enchantments would allow their effects to be more powerful and complex, which is necessary to capture the storylines behind these famous locales
Its very strong to cast Taigam, Master Opportunist, then follow it up with something like a Shock and a Preordain, and this card should see plenty of play in blue-based tempo decks
Flashing it in stuns a creature right as it matters most, freezing an attacker or defender
Five mana for two creatures
In my experience its a lot easier to find regular Shadowless cards compared to 1st Ed
But the real reason we would want to play Dr