Usually found in treasure chests, relatively useless as it behaves pretty much like a normal Slimemoss except that it cannot reproduce, but has an abnormally high Defence and Resistance. You can create a Slimederella Moss by breaking a tile that has exactly 9 Nutrients and 9 Mana in it (so you get a Slimemoss that has 9 mana) then allowing that Slimemoss to flower.

HP 50
ATK 13
DEF 40
RES 40