Shadowless cards were produced immediately after the 1st Edition print run, hence there is some slight crossover with a small number of 1st Edition Shadowless cards
At the beginning of combat on your turn, you may have Gogo, Mysterious MimeGogo, Mysterious Mime become a copy of another creature you control until the end of the turn - but since Gogo keeps its name, you're free to copy legendary creatures too
Whenever Doric attacks, you may pay 1G
That was true of Tolarian Academy too, though
This could be a potent component for a day/night switching deck where you amass 3+ triggers each time, but we can do better than a Horned Turtle that might accidentally let your opponents werewolves enter on their Nightbound side
Especially when searching on Japanese flea markets, the panic itself becomes a risk, so it is important not to skip comparisons