I propose the idea of adding a Celestial Brush, like from Okami. You would craft it using feathers and sticks and maybe something like a Nether Star to make it end-game. It would make you able to draw symbols to use the Brush Techniques from Okami. For instance, drawing the Cherry Bomb symbol from Okami (circle with a line through it) to create a primed TNT or the Galestorm symbol (a swirly) to create wind to push mobs. It would like put up a GUI where you draw the symbol and then it takes the effect. However, each skill would use up ink sacs
Okami Celestial Brush Mod