contains several Norse gods and beings as summonable Personas. Additionally, some skills such as Odin's Thunder Reign, Loki's Niflheim, and Surt's Ragnarok are derived from Norse mythology. In the video game Xenogears, names were taken from Norse mythology. These names include, but are not limited to, Andvari, Fenrir, Heimdall, Sigurd, and Yggdrasil. The MMORPG RuneScape has a few notable Norse mythology links, mostly in the 'Fremennik Tribe' and their quests. In the MMO Dark Age of Camelot there are three playable realms, one of which is called Midgard. The people encountered there have many references to Norse mythology, and they have such playable classes as Berserker, Runemaster, Skald, Thane and Valkyrie. The video game Magicka is loosely based on Norse mythology, and contains several elements and references. The role-playing game The Elder Scrolls V: Skyrim by Bethesda Softworks is heavily influenced by Norse mythology in its setting. In Age of Empires Online the Norse are a playable faction. In the PC game Heroes of Might and Magic III, the faction Stronghold has a few Norse mythology elements, one being the building Valhalla. In the Heroes of the Storm, playable hero Tychus can call down the Odin, a heavy combat walker, as one of his two heroic abilities. Cassia can use her heroic ability to summon a Valkyrie that rushes towards her, pulling the first enemy Hero hit, and knocking back all other enemy Heroes in the way. In the PC MOBA, Smite, several playable gods are from the Norse pantheon. Currently, there are Thor, Odin, Loki, Hel, Fenrir, Ymir, Sol, Skadi, Freya, Tyr, Ratatoskr, Fafnir, Ullr, Jörmungandr Heimdallr, and Surtr. The puzzle platform game Munin is about Odin's raven Munin, whom Loki has stripped of wings and transformed into a human girl, and who has to travel through the nine worlds of Yggdrasil to relocate her missing feathers. In the 2011 video game Dark Souls, there is a large, sword-wielding wolf named Sif that serves as a boss battle in the game. Sif's name references the Nordic goddess of the Earth, Sif, and he is a direct reference to the great lupine son of Loki, Fenrir. In the role-playing game series Etrian Odyssey, the Yggdrasil Tree is a recurring plot element of great relevance and significance. In the 2017 video game Hellblade: Senua's Sacrifice, Norse mythology plays a key role in design of the world and enemies, with the developers