Designer Notes: Put permanent cards in your graveyard to power up you commander and swarm the board with fungus tokens
Shiko and Narset copy at most one spell each turn, and make us work a bit to unlock that value
You could have kept the old template as the defining characteristic of the race moving forward
Summon: Leviathan Rating: 8/10 A big blue board wipe attached to a 6/6 creature would be absolutely absurd
Horsemanships unique evasion means your knights are suddenly charging past those blockers, and it works better than a Levitation in terms of turning your board into an instant threat
Not surprisingly, the card hasn't been reprinted since 1993 (the very first set of Magic's existence), although there was a Mystery Booster card printed in 2019 called Problematic Volcano which effectively serves as an homage to this card, and according to Ethan Fleischer, a mechanic that worked in a similar vein was experimented with for Theros: Beyond Death in 2020