Wyvern folklore is rarely fire-breathing like the four-legged dragon. Sometimes modern fantasy book and media authors have wyverns that are frost-breathing or poison-breathing instead of fire-breathing. The current spelling "wyvern" is not attested before the seventeenth century as "winged two-footed dragon". According to the Oxford English Dictionary, it is an alteration of Middle English "wyver" (attested thirteenth century), from Anglo-French "wivre" (cf. French "guivre" and "vouivre"), which originate from Latin "vīpera", meaning "viper", "adder", or "asp". Conversely, medievalist William Sayers proposes a more complex origin for the term. He notes that the Anglo-French "guivre" and its Middle English derivative ceased to
Wyvern (video game) Yegge stated that he was working on rebooting Wyvern, although there were legal issues in the process of doing so. In April 2013, Yegge, having received clearance from Google to use Wyvern as a side project, announced his vision of a cloud-based Wyvern initially to be brought back on a mobile platform. In December 2016, Wyvern was re-released as an iOS game, with Yegge as the sole owner of the game after two years of negotiation with Wyvern's original owners. Now Wyvern is available for public play on iOS Appstore and Google Play. A PC version is in work. Wyvern