Three copies of Soul Eater are available in the Card Shop all week. As a solid level 5 with the skills to hold back swarms or deprive them of field and SP, Soul Eater could find a home in a mid-big Lawt file. There are a number of powerful low-rarity big cards available in all the spheres, like Volcano Wyven and Giant Artho in Gowen, or the newly buffed Legendary Unicorn (Refess) and Deep Squid (Falkow). It's a great idea to try these cards out and learn to play bigs. Usually, your cost of entry is a lvl 1 Sac unit and two SP-generation grimoires from your sphere. The +3 to a sphere soul skills help open, too. Learning how to play bigs adds a whole new dimension to Alteil, letting you control the flow of the game and channel large amounts of SP into where it's needed the most. Those skills will help you when you go back to your lvl 3 rushes, too!
"Scissors are overpowered. Rock is fine." -Paper