Not only they can change their shape into anything, but each individual slug possesses strong explosive powers. Their illusionary abilities were shown to have many uses, with the most blatant examples being invisibility and construction of an illusionary landscape. With the Construction characteristic of the Mist Flame, illusions created by the Spettro Nudibranchi become real.
With their capacity to fuse with illusions, the Spectral Sea Slugs can merge with their master by synchronizing their illusions. However, this combination can be easily broken if that synchrony is compromised, as Takeshi Yamamoto proved by having Kojirou make the Spectral Sea Slugs become lethargic with its Rain Flames.
- Mirage Body ((ミラージュボディ, Mirāju Bodi?))
- Fusion with Illusions ((幻覚融合, Genkaku Yūgō?))
- Guided Explosions ((誘導爆破, Yūdō Bakuha?))
- Miraggio di Nebbia ((
霧蜃気楼, Mirajjo di Nebbia (Kiri Shinkirō)?))
- Multi Spettro ((
無幻, Muruti Supettoro (Mumaboroshi)?))
- Danza Spettro Spada - By combining the powers of this Box Animal with that of the Spettro Spada, Genkishi simultaneously releases a barrage of missile-shaped Spectral Sea Slugs and Mist Flame projectiles.
- Extra Danza Spettro Spada - A more powerful version of the Danza Spettro Spada, Genkishi creates a number of illusionary clones of himself so that he can release an even greater number of missiles and Mist Flame projectiles. This variation leaves no room for escape and is described by Basil as a solid mass of Flame energy.