He-Man was slimmed down to a more realistic musculature, and transported into the distant future for science-fiction adventures on the alien planet Primus. Along with the revamped character, the Power Sword was also redesigned into a more futuristic-looking form, with a green laser blade that could fire bolts of glowing energy. In 1990, Jetlag Productions produced a new cartoon, The New Adventures of He-Man, to promote the new toy line. In this series, Prince Adam's phrase to transform into He-Man is changed from "By the Power of Grayskull..." to "By the Power of Eternia..." He-Man's sword was a more important element in this version, gaining the ability to fire energy blasts and pulses of magic. 2002 television series In the animated 2002 reboot, the origins of the Power Sword and Castle Grayskull are again revised. The castle is revealed to be the former home of the ancient warrior King Grayskull, who resembles He-Man but larger and with longer Viking-like hair and a massive green saber-toothed lion as a steed. The Power Sword is King Grayskull's personal weapon, and after fighting a fatal battle with Hordak, the dying king binds his mystical powers to the weapon. Afterwards his advisers become the Elders who seal the castle, and his wife becomes its guardian, the first Sorceress. Therefore, when Prince Adam holds up the sword and calls out "by the power of Grayskull" he is calling on the energies of King Grayskull himself, rather than those of the namesake castle. The sword was heavily redesigned for the new cartoon but with a much more complex and mechanized look. When held by Prince Adam, it appears smaller. However, during the transformation sequence, the hilt pivots on an axis and changes shape, taking a new form when it is in He-Man's hands, and is more explicitly shown growing in size in the revised transformation sequence from the second season. In the series finale, it is shown that an alternate mode can be accessed wherein the blade splits in the middle and opens to reveal another emerald blade inside. The sword then appears to be two fangs (the blade) and a snake's tongue (the emerald blade). This mode of the sword was used to battle Serpos, the giant snake deity that was imprisoned in Snake Mountain. Also in this series, Skeletor possess twin swords that can be combined into one larger sword, a reference to the