Traditionally, that number is six, but the Game Boy version allows three and four
here, Dragon's Maze / Gatecrash / Return to Ravnica )
Fundamentally, I'm not sure that Eiganjo has an easy home right now, but it's a powerful enough spell/land that it's worth keeping in mind, and it will probably show up in Modern at some point
Pokemon Shining Fates card list & price guide
The Mirage design team (Bill Rose, Joel Mick, Charlie Catino, Don Felice, Howard Kahlenberg, and Elliot Segal) while working on Visions ended up creating enters-the-battlefield effects as well, but I hadn't yet seen the cards when I created Gravedigger
Once the embodiment of justice (and also big cats), hes been warped into a truly terrifying four-mana planeswalker in Dominaria United